Added Flattr button to README.
Improved handling of MWPhotos created with UIImages.
Action button is now disabled until the image has loaded.

Closes #110
MWPhotos initialised with URLs can now handle, file, asset or web paths. Requires AssetsLibrary.framework.

As discussed in #64
Updated README for photo URL changes.
Fixed status bar issue and improved control hiding and showing in iOS 7.

Fixes #131
Tweaks to zooming scroll view.
Fixed bugs loading photos from the asset library.
Added library asset support in demo app.
Updated README