[reflect] Object graph support

[Dain Sundstrom]

I've committed my initial work on build object graphs with xbean  
reflect.  The code works, but I need to do more testing and a few more  
features are needed.  I'm going to be on vacation for the next 10  
days, and if you all decide to do another release of xbean for the  
quick fix Guillaume suggested, please don't release this code.

Thanks,
-dain