Adds storyboard initialisation support. Updates documentation
Includes asserts in initialisers methods
Adds storyboard to Twitta project + pod dependencies
Resets Twitta sample project, built with Swift instead
Adds Swifter and implements oauth + private message fetching
Small progress integrating Swifter
Merge branch 'ib-storyboard-support'

Conflicts:
	Source/Classes/SLKTextViewController.h
Removes swift sample project (for now)
Fixes some typos on the template files