Modernize & convert to ARC
Add full element test suite
Update FastFountainParser to pass tests

Not all tests are passable without a significant rewrite of the parser.
The tests are somewhat edge cases.
Add CocoaPods podspec
Add Sample Project for iOS
Update Fountain to build for iOS

Handle NSFont/UIFont with a #define. iOS 7 lets us use the same code for
calculate the heights of text blocks.
Set up sample iOS app
Update podspec for both platforms
Moved sample Mac project to its own folder