Finish this MPTC based QPar approach.  Add a test for it.
Merge branch 'MPTC_again'
Filling in CancelT LVarSchedQ instance.  Running into problems.

Interestingly, look at the bit labeled "LINE X".  Uncommenting the line
below it makes it fail in a confusing way.
Fix the previous problem by having freezeLV return a Proxy as well.