Hi! I tried to follow these instructions, and received a warning upon build.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_alert_dialog_button_bar_material.xml(18,1): Androidwarning Android: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from <android.support.v7.internal.widget.ButtonBarLayout>
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_alert_dialog_button_bar_material.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_alert_dialog_button_bar_material for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_alert_dialog_material.xml:48: note: removing attribute http://schemas.android.com/apk/res/android:textAlignment from <android.support.v7.internal.widget.DialogTitle>
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_alert_dialog_material.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_alert_dialog_material for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_dialog_title_material.xml:29: note: removing attribute http://schemas.android.com/apk/res/android:textAlignment from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_dialog_title_material.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_dialog_title_material for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_screen_toolbar.xml:27: note: removing attribute http://schemas.android.com/apk/res/android:touchscreenBlocksFocus from <android.support.v7.internal.widget.ActionBarContainer>
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_screen_toolbar.xml: note: using v21 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_screen_toolbar for configuration v21.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml:47: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml:78: note: removing attribute http://schemas.android.com/apk/res/android:dropDownVerticalOffset from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml:78: note: removing attribute http://schemas.android.com/apk/res/android:dropDownHorizontalOffset from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_search_view for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_select_dialog_material.xml:23: note: removing attribute http://schemas.android.com/apk/res/android:overScrollMode from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_select_dialog_material.xml: note: using v9 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_select_dialog_material for configuration v9.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media.xml:42: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media.xml:34: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media.xml:34: note: removing attribute http://schemas.android.com/apk/res/android:layout_toStartOf from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_big_media for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:60: note: removing attribute http://schemas.android.com/apk/res/android:layout_toEndOf from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:46: note: removing attribute http://schemas.android.com/apk/res/android:layout_toEndOf from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:46: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:38: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:38: note: removing attribute http://schemas.android.com/apk/res/android:layout_toStartOf from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml:30: note: removing attribute http://schemas.android.com/apk/res/android:layout_alignParentEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_big_media_narrow.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_big_media_narrow for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml:77: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml:96: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml:64: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml:27: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_lines.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_lines for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_media.xml:43: note: removing attribute http://schemas.android.com/apk/res/android:layout_marginEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_media.xml:33: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_media.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_media for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_part_chronometer.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_part_chronometer.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_part_chronometer for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_part_time.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/notification_template_part_time.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/notification_template_part_time for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:drawableStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml: note: using v13 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/select_dialog_multichoice_material for configuration v13.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:drawableStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml: note: using v13 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/select_dialog_singlechoice_material for configuration v13.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/drawable/abc_textfield_search_material.xml:19: note: removing attribute http://schemas.android.com/apk/res/android:state_activated from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/drawable/abc_textfield_search_material.xml: note: using v11 attributes; synthesizing resource com.cedarrivermusic.androidapplication:drawable/abc_textfield_search_material for configuration v11.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml:47: note: removing attribute http://schemas.android.com/apk/res/android:layoutDirection from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/abc_search_view.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/abc_search_view for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_multichoice_material.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/select_dialog_multichoice_material for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingStart from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml:18: note: removing attribute http://schemas.android.com/apk/res/android:paddingEnd from
/Library/Android/sdk/extras/android/support/v7/appcompat/res/layout/select_dialog_singlechoice_material.xml: note: using v17 attributes; synthesizing resource com.cedarrivermusic.androidapplication:layout/select_dialog_singlechoice_material for configuration v17.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/styles_base.xml:181: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.Widget.AppCompat.Spinner for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/styles_base.xml:227: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.Widget.AppCompat.ListPopupWindow for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/styles_base.xml:235: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.Widget.AppCompat.PopupMenu.Overflow for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/styles_base.xml:240: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.Widget.AppCompat.Light.PopupMenu.Overflow for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:25: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Platform.AppCompat for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:64: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Platform.AppCompat.Light for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:447: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.V7.Theme.AppCompat.Dialog for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:470: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.V7.Theme.AppCompat.Light.Dialog for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:561: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.ThemeOverlay.AppCompat.Light for configuration v5.
/Library/Android/sdk/extras/android/support/v7/appcompat/res/values/themes_base.xml:589: note: using v5 attributes; synthesizing resource com.cedarrivermusic.androidapplication:style/Base.ThemeOverlay.AppCompat.Dark for configuration v5.
Any suggestions would be welcome. Thanks!