:bug: python closures are tricky business
:bug: python closures are tricky business

Capture entries in loop with default arguments.

Also keep a library of merged shapes so as to not blow out the waveform
memory.

--CAR and DR

BBN-Q/PyQLab,calebjordan/PyQLab,rmcgurrin/PyQLab,Plourde-Research-Lab/PyQLab