Image works for adding book
Book cover done

Book cover works for all add, detail, and edit.
aaaa
Merge branch 'Jing'

Conflicts:
	TextbookExchange.xcodeproj/project.pbxproj

TextbookExchange.xcodeproj/project.xcworkspace/xcuserdata/Qihong.xcuserd
atad/UserInterfaceState.xcuserstate
	TextbookExchange/AddBookViewController.h
	TextbookExchange/AddBookViewController.m
	TextbookExchange/Base.lproj/Main.storyboard