Ported to android-21
Don't make parameters final
Merge pull request #6 from taky/master

Ported to android-21
Update project for final L release

The project now requires Android Studio 0.8.9 or above
Remove unnecessary line for final L release
Various fixes

Fix color filter animations
Update to Gradle 2.1
Update to Gradle tools 0.13.2
Add content description strings to images
Fix RTL issue