added fsharpbinding live ebuild for latest fsharpbinding.

I added a pull request to be able to discuss the ebuild.
For example i don't know if the /usr/lib/monodevelop/Packs is the "right" folder to write the pack file into.
Also the emacs use flag is not working because I don't need it and I'm not experienced with installing emacs addins.

I tested the ebuild for monodevelop 4 and if you follow the printed instruction it should work fine.