IPF-11: IN-PROGRESS
Merge branch 'develop' into feature/IPF-11

Conflicts resolved using 'mine':
	ios-police-foundation/ios-police-foundation/Classes/ViewControllers/PFCategoriesViewController.m
IPF-11: IN-PROGRESS

- added posts, tags and updated categories view controllers
- added accompanying cells as well.
- fixed a few issues with NSString extensions
IPF-11: COMPLETED

- added blog details view controller (with minimal details showing)
Merge branch 'feature/IPF-11' into develop