Imported Dagger v2.
Get building blocks.
Used injection for Settings.
Used injection for Bible.
Used injection for ReadingProgressManager.
Used injection for DatabaseHelper.
Merge branch 'use-dagger'
Added missing comments.
Fixed usage of ads.
Imported Butter Knife.
Used injection for activities.
Used injection for fragments.
Used injection for view holders.
Merge branch 'use-butterknife'
Updated notification icon for Lollipop and above.
Merge branch 'develop'
Fixed view injection.
Added missing comments.
Improved app update check.
Added workaround for null pointer exception.