Merge pull request #11 from Jwashton/BibleReaderLayout

Merge BibleReaderLayout changes into master
Implemented backstack functionality through the back button. Created a method to handle all fragment transitions. Moved action bar layout setting to the fragments instead of the activity.
fixing commit conflicts
Merge pull request #12 from Jwashton/BibleEngineHelper

Backstack implementation from BibleHelper branch
Merge pull request #15 from Jwashton/master

master  into Bible Reader Layout