Get rid of the bundled RegexKitLite as it results in duplicate symbols on linking if a project depends on RegexKitLite via Podfile

I have a project that depends on RegexKitLite via the Podfile and the fact that ParseKit had its own copy of the RegexKitLite bundled in the sources resulted in nasty duplicate symbols during the linking stage.

I've removed the RegexKitLite sources from the repo and instead added RegexKitLite as a dependency on the ParseKit pod spec. Also, to keep the Debug/Demo apps compilable, I've CocoaPod-enabled the project. So, it now has a Podfile and one should do a `pod init` before hacking.

Yours fork seems to be the most maintained on GitHub currently so I've decided to fork it and add some essential patches. ;)