http://winetricks.googlecode.com/svn/trunk/src/install-gecko.sh also installs mono

[Dan Kegel]

http://winetricks.googlecode.com/svn/trunk/src/install-gecko.sh now
also installs mono.

It should be probably be called wine-install-addons.sh now, maybe
I'll rename it that soon.  If you have a better idea for the name,
let me know.

(I've also deprecated the copy that was in winezeug; that one now just
tells users to get it from the winetricks repo.)