Set the runloop mode so that gifs animate while scrolling

h/t @josharian
Removed commented out code.
Merge remote-tracking branch 'upstream/master'
Fixed an issue where table/collection cells would stop animating.
Added gitignore, and organized the project.
Merge pull request #7 from nickoneill/master

Fixes for table views
Implemented +imageNamed: & +imageWithContentsOfFile:
Fixed compiler warning in the app delegate.
Enabled more static analysis warnings.
Fixed a variable shadowing warning.
Use CADisplayLink instead of a NSTimer for the update loop.
Merge branch 'master' into DisplayLink
Use OLImage +imageNamed
Demo Images now fit on an iPhone screen.
Added example gifs that tick up at different frame rates
Improved the accuracy of frame durations.
Moved demo images into their own directory.
Added documentation to OLImageView.runLoopMode
Replace the setResponseImage: method instead of overriding the getter and using a separate AssociatedObject for the image.
Merge pull request #9 from ejensen/AFImageRequest-Improvments

AFImageRequestOperation category improvement