[Cuis] New updates: WeightTracer / ReferenceFinder

[Juan Vuletich]

Hi Folks,

I just did a commit to the repo. It includes the updated ReferenceFinder 
and brand new WeightTracer by Andres Valloud and Jan Vrany (thanks folks!).

Open an inspector on a window (using the halo). In the bottom pane 
evaluate 'ReferenceFinder openExplorerOn: self' and 'WeightTracer 
openExplorerOn: self'. Check the object trees to see what you have 
there. Read ClosureScanner class comment. You'll agree with me that this 
is truly great!

Also, several contributions by Ken (thanks Ken!), and a few fixes to 
Display updating, font creation, etc. by yours truly.

I also included an xml file with the test results.

Cheers,
Juan Vuletich