Squashed 'GCDNetworking/' content from commit 4615a4c

git-subtree-dir: GCDNetworking
git-subtree-split: 4615a4cb753a6a725b615d216ea5557a19cca84d
Merge commit '0c1966cbaaf27a8746fdc9f58f9a9b85b16e7adc' as 'GCDNetworking'
Initial import