Category swiping
Fix play library path
Save state of category pager. Fix play button bugs. Handle destroy fragment view
Merge pull request #87 from Lyricoo/category-swipe

Category swiping
Move gcm and polling related things to new sync package
Change gcm id to be stored in shared prefs
Make gcm id work with multiple users. Add logout
Merge pull request #89 from Lyricoo/gcm-refactor

Gcm refactor
merged changes