[Mono-list] Nunit sources in cvs now

[Nick Drochak]

> Although Nunit now runs, there are some problems in the build 
> of the tests.  I'll be working on that from now.

I had to add try-catch blocks around the body of some of the test
methods (MemoryStreamTest and BitArrayTest) because Nunit was not
properly catching the exceptions thrown by our corlib.  Not sure why.
It seems to catch some others. 

I reported this as a bug on the Nunit SourceForge site.  Hopefully this
is something they can fix.

Nick D.