[Ur] interfacing with ruby

[Marc Weber]

Excerpts from Marc Weber's message of Wed Dec 08 12:45:51 +0100 2010:
> http://gitorious.com/some-urweb-utility-libraries/uw-ruby

I added it to the library and ffi page on the wiki
http://impredicative.com/wiki/index.php/Libraries_and_FFI_bindings#uw-process

Enjoy and provide feedback.
I could'nt compile a function which does not take arguments (passing the
conntext id) - so I had to add a dummy parameter.

Marc Weber