[Python.NET] calling Finalize directly

[mtraudt]

I realize that you cannot currently build on mono
due to other limitations, but it seems that mcs also
does not like the fact that you call Finalize()
directly in some cases.

The MS compiler does not complain, although on
MSDN it says not to do this, and to use Dispose()
instead.  Is there any reason why you call
Finalize() directly?

Mark