Fixes New Proposal Creation

Fixes both the new proposal form and the controller create method.

The create method had an unused variable called parent whose creation was causing a problem, so I commented that out for now.  The id of a parent proposal is used when an improvement to a proposal is made, but not when a brand new proposal is created.

It seems some separation of these two operations would make sense.  Perhaps an improvement controller?

Sorry, I submitted this with the wrong github user.  I hope its not a problem.  SHould have been calasyr.  Rather than trying to delete and recreate, just noting it.