Add semi transparent button in sample app
Remove circle fill from shadow drawables
Add xxxhdpi drawables
Merge pull request #21 from futuresimple/chalup/semi-transparent

Chalup/semi transparent
Gradle plugin bump
Added onClickListener to sample project
runProguard => minifyEnabled
Fix for rotation animation not working in proguarded builds
Merge branch 'dev'

Conflicts:
	sample/src/main/res/layout/activity_main.xml