[FEATURE] Animation directions for controller push

Conflicts:
	FRLayeredNavigationController/FRLayeredNavigationController.m
[BUGFIX] - Update to xcode 4.6
- Resolve warnings/analysis errors
[BUG] Fix type mismatch.
Syncheck pass
Add basic direction animation features

Conflicts:
	FRLayeredNavigationController/FRLayeredNavigationController.m
Another syncheck pass
Merge branch 'master' into feature-directions

Conflicts:
	FRLayeredNavigationController/FRLayeredNavigationController.m
Merge branch 'master' into feature-directions
[FEATURE] Change animation direction API up
Merge pull request #34 from sptramer/feature-directions

[FEATURE] Configurable animation directions