Structure refactoring
Merge remote-tracking branch 'origin/master'

Conflicts:
	library/src/main/AndroidManifest.xml
	library/src/main/java/com/droidkit/gallery/picker/GalleryPickerActivity.java
	library/src/main/java/com/droidkit/gallery/picker/PicturePickerFragment.java
	library/src/main/java/com/droidkit/gallery/picker/PictureViewerAdapter.java
	library/src/main/java/com/droidkit/gallery/picker/PictureViewerFragment.java
	sample/src/main/java/com/droidkit/gallery/sample/MyActivity.java
Animation implemented