Updating external libraries, initial changes to support orientations, code cleaning

Supporting interface orientation is still buggy
Fixing a bug when wrong photo is loaded when rotating the last photo

thanks to github.com/dmac81
Updating .podspec
Changing AFNetworking version to 2.0.1
Changing AFNetworking version to 2.0.0
Changing back AFNetworking version to 2.0.2
Updating .podspec
Bug fixes

- Fixing a glitch when using the zoom-in animation and white background
color;
- New feature: arrow buttons change photos animated.