[IronPython] clr.AddReference and derivatives

[Dan Eloff]

Thanks Dino, that's a great explanation. Now I know where to use each
of the AddReference methods. Thanks also for the debugging tips, I
managed to figure out what the problem was, I specified x86 platform
(thinking silverlight is exclusively 32bit) but you have to leave it
as Any CPU or the assembly will not be loaded.

Many thanks,
-Dan