Mark deprecated old callbacks with @Deprecated so the IDE shows it

For any IDE that brings in the dependency without sources, it won't show it as deprecated
Make builder listeners protected, set them in the constructor

Builder should just create the instance with the builder, setting these listeners should be done in the constructor. Made the listeners protected to match the other fields, and make them available to subclasses.
Better RTL support

Use end and start where appropriate, leave existing left/right declarations to support <17 devices
Use diamond operator instead of explicit type argument

Yay Java 7
Merge pull request #146 from hzsweers/master

Some misc tweaks