removed background drawing code + simplifications
finished moving backgrounds to fragments
repaired tab selection after click on notification
Merge branch 'optimize-backgrounds' into unstable

* optimize-backgrounds:
  repaired tab selection after click on notification
  finished moving backgrounds to fragments
  removed background drawing code + simplifications
Merge branch 'unstable' of github.com:stestaub/drallo-app into unstable

# By Roman Yemelyanenko
# Via Roman Yemelyanenko
* 'unstable' of github.com:stestaub/drallo-app:
  side bar for android
  Refactoring
  side bar menu for android

Conflicts:
	DralloAndroid/Activities/MainNavigationActivity.cs
	DralloAndroid/DralloAndroid.csproj
	DralloAndroid/Resources/Resource.designer.cs