New winetricks 20080423: added mono19, removed mono1[12], updated xvid

[Dan Kegel]

Another day, another Winetricks.  Changes:

r40
Update to latest mono
Remove mono11 and mono12 verbs, replace with mono19
Abort properly on network errors

r39
Updated xvid

As always, get it at
http://kegel.com/wine/winetricks
or
http://code.google.com/p/winezeug