more info on the bindings page

[Stefan Sauer]

hi,

We have
http://gstreamer.freedesktop.org/bindings/

I think it would be cool to have direct links to:
* bindings homepage
* bindings docs
* bindings code-repo
* bindings version of
http://cgit.freedesktop.org/gstreamer/gstreamer/tree/tests/examples/helloworld/helloworld.c

I'll update the table on the web as bindings maintainers reply here (or
to me).

Stefan