[tclquadcode] 'expand' branch merged

[Kevin K. <kev...@gm...>]

I've done a 'merge --integrate' of the 'expand' branch into trunk.
Quadcode now understands most uses of {*} and can even do a competent
job of optimization with some of them.

I might not be doing all that much more quadcode development for a few
days. In the meantime, let's try to triage what should come next. Are
we trying next to go to full integration with Tcl's arrays? (I haven't
thought much about that, but that's the way Donal seems to be
heading.)

Kevin