Made the necessary changes to ensure backwards compatibility with iOS 5.0 ( with the tradeoff being loosing the ability to use attributed strings on UITextFields) a CoreText implementation would make this fully backwards compatible without loosing any of the functionality.
Bumped podspec s.version up
Removed temporary addition of CoreText framework
Better alternative text when the custom class for a reuse identifier is not supported.
Merge pull request #5 from ZebtinRis/master

iOS 5.0 compatibility.