Updated android gradle plugin
Version bump
Updated build tools version
Updated target and compile sdk version
Updated gradle version
Using explicit muzei api version
Removed unused import
Enabled RTL support

http://android-developers.blogspot.it/2013/03/native-rtl-support-in-android-42.html
Updated Calligraphy version
Added attribute to avoid error being correct

https://code.google.com/p/android/issues/detail?id=65176
Optimized layouts
Added content description strings
Added build folder to ignore
Merge branch 'master' of github.com:maxcanna/muzei-webcam

Conflicts:
	.travis.yml