Totally simplified.
AFNetwork is not relied any more.
Some features may be removed, please use it at your own risk.

Conflicts:
	FBImageViewController_Demo/FBImageViewController_Demo.xcodeproj/project.pbxproj
	FBImageViewController_Demo/FBImageViewController_Demo/DemoViewController.m
	FBImageViewController_Demo/FBImageViewController_Demo/FBImageViewController_Demo-Info.plist
	FBImageViewController_Demo/FBImageViewController_Demo/en.lproj/MainStoryboard.storyboard
	MHFBImageViewController/MHFacebookImageViewer.h
	MHFBImageViewController/MHFacebookImageViewer.m