Set up material theme.
Progress bar optimisation : animation.
List view optimisation : Google's AsyncDrawable pattern.
Merge remote-tracking branch 'origin/res/ui' into feat/localMusicAccess

Conflicts:
	app/build.gradle
List sort optimisation thanks to MultipleBufferedList.
Commit error fixing.
Clean up !
Comment !
Decoupling between MultiBuferedList and the used list implementation.
Comment and clean up !
Improve loader manager with weak reference.
List view optimisation with AsyncDrawable and scaled bitmap loading.
Clean up !
Clean up !
Helpers refactoring.
Making Folder item more S.O.L.I.D. for bug fixing : crash when folder does not exist.
Merge branch 'master' into feat/tagModification

Conflicts:
	app/src/main/AndroidManifest.xml
	app/src/main/java/binauld/pierre/musictag/activities/MainActivity.java
	app/src/main/java/binauld/pierre/musictag/adapter/AudioItem.java
Fixing merge issues.