The Vera fonts have subfamily names like 'Roman' or 'Oblique' which 
freaks out TTCFont.
In fact, the base font seems to have a subfamily name 'Roman' but the 
TTCFont assumes the base font subfamily name is 'Regular'.

So, what happens is the first font loads in OK because no analysis is 
done on the subfamily name.  The second font causes a reorganization of 
the family name cluster and you get all kinds of assumptions being 
broken by unexpected subfamily names.  So you can never load in a 
second Vera font.

This changeset adds a synonyms dictionary to TTCFont that maps the Vera 
names to the appropriate indexes.  It allows you to load all the Vera 
fonts at once (and they look pretty nice).  I've left a halt in the 
method that does the lookups - if you ever try to load a font that has 
a wacky subfamily name, please update the dictionary and post your fix.

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-Todd Blanchard