[interfacekit] BClipboard

Hey guys, we have a working clipboard.  I had to fix a few more things 
than I anticipated during my system problems, but it now passes all of 
its tests.  The same can't be said for the R5 implementation.  5 of my 
test cases would crash in R5 if I didn't use the TEST_R5 stuff.  The 
first case for the LocalCount function only passes some of the time (it 
read unitialized memory).  In the event that somebody passes a NULL 
pointer to the constructor, my implementation attaches to the system 
clipboard rather than blowing up in your face like R5.  I suppose I 
should document that behavior, but I am not sure that I want to 
encourage people to attach to the system clipboard that way.

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