Merge branch 'experimental-0.7'

Conflicts:
	AFNetworking/AFHTTPClient.h

Bumping version to 0.6.1

Updating README

Extracting LICENSE information into its own file

Adding -cancelImageRequestOperation to UIImageView category

Improving performance of UIImageView -setImageWithURL:... by cancelling running operation if new image url request is different than passed url request

Wrapping network thread lazy initializer with dispatch_once, to ensur…

…e thread safety

Fixing no data success callback parameters

Significant performance improvments and API redesign

Removing Q*Operation dependency

Merge pull request afterthought#1 from jakemarsh/patch-1

Adding missing dealloc method in AFImageRequestOperation