delete book and delete books
checkout book
update book informations
add icons
set launch image for is
Merge branch 'fetchbooks'

Conflicts:
	PFL/PFL.xcodeproj/project.pbxproj
	PFL/PFL/Base.lproj/Main.storyboard
	PFL/PFL/PFL-PrefixHeader.pch
	PFL/PFL/PFLBookDetailViewController.m
	PFL/PFL/PFLServices.h
	PFL/PFL/PFLServices.m