Things that are still not right:
* BottomNavigationView doesn't read out the title of items when selected.
Created this issue: https://code.google.com/p/android/issues/detail?id=230595&thanks=230595&ts=1482125499
* TTS reader combines the app name and summary without a pause which is jarring.
* Touching the background of the recycler view in the categories view reads all category names.
* Likely other problems too.
