Interactive regular expression matching and validation.

Reggy 2.0 is being rewritten from the ground up! Development and support has moved to [Github](http://github.com/samsouder/reggy/). Please enter all new bugs and feature requests into the new [project issue tracker](http://github.com/samsouder/reggy/issues) there. Reggy is a small OS X cocoa/objective-c application to very quickly visualize what a given regular expression will match given a test string. It will also tell you if you have errors in your regular expression.