Provide stateless extension

As discussed with Leonardo, i create an issue with the stateless jsf extension.
The code: http://www.mediafire.com/?3wr72zlch7ly1wc (also prepared with myfaces namespace and checkstyle)

This extension is based on: http://industrieit.com/blog/2011/11/stateless-jsf-high-performance-zero-per-request-memory-overhead/ (Thanks to Rudi!)
I completely refactored the code and made it compatible with mojarra and myfaces (with extra modules).