rebuilt
Changed 'book' to 'collection' and 'page' to 'document'
Updated UI to match new wording
Updated class names
Setup add document controller
Cleaned collection VC UI
Enabled selection of collection
Disabled segueing to documents from list of collections
Refactored layout
Removed redundnant call to folder creation
Updated collection to support array of documents
Got the list VCs working
Updated collection model
collection automatically updates after adding a document
Moved camera code to the document list VC
Enabled document scroll view
Enabled deleting documents