23.1.0

design support library (23.1.0)

• https://developer.android.com/tools/support-library/index.html#revisions
• https://developer.android.com/tools/support-library/features.html#design
• https://android-developers.blogspot.com/2015/05/android-design-support-library.html
• https://android-developers.blogspot.com/2015/10/android-support-library-231.html