Removed json calls from root Documents controller; minor spacing adjustments
Refactored the rangular Document factory to make it behave more like a factory; Refactored the DocumentsController and its interaction with the DocumentFactory so factory doesn't have to know about callbacks (i.e. the controller uses a promise now)
Style and layout updates to make it just a 'bit' more appealing to work with
Merge branch 'development' of github.com:simplesessions/rangular-demo into development