You can now navigate through the selling and buying steps without any information storage or data retrival.  There is also a registration page with no information saving.
Added code for choosing an image and then viewing that image when you are selling your textbook.
Added UploadPicture class.
Added code for Picker to help select categories for books.
Added Registration links on Storyboard to links on Registration.h
Renamed ViewController to HomeViewController. Modified UI on HomeViewController.
Fixed merge conflicts.
Modified the Storyboard for SellBook to be a picker for category.  Linked references in storyboard for selling books to SellBookViewController.m.  Added code in SellBookViewController.m for the picker.
Renamed Registration to RegistrationViewController. Fixed bug with NSArray to NSString conversion in BuyBook.
Added UI features to RegistrationViewController.
Merged with updated GUI, added Controller for Selling Books.
Added TPKeyboard Library. Enhanced UI for Registration. Added LoginViewController.
Fixed merge conflicts in Storyboard.
Working registration (still need to alert users on error). Transition for view added upon successful register.
Added SellBookVIewController that allows you to populate the database with books.
Modified SellBookViewController story board to fit mobile screen. Fixed bug in LoginViewController. Started work on InventoryViewController.
Fixed merge conflicts.
Fixed more merge conflicts :)
Added a bunch of stuff.
Added external libraries. Added sellbook feature (need to add alert system).