Coverflow implementation adopted to LSY
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/src/main/java/com/ap/androidltest/fragment/CoverFlowFragment.java
	app/src/main/java/com/ap/androidltest/widget/CoverFlowLayoutManager.java
	app/src/main/java/com/ap/androidltest/widget/GalleryLayoutManager.java
	app/src/main/java/com/ap/androidltest/widget/GalleryRecyclerView.java