Unify proposal title and program name

[swalker2m]

There are two goals expressed in ShortCut 2422:

• Remove the duplication between program name and proposal title
• Make it possible to add an abstract to all programs, even if they don't go through a TAC process

Accordingly I made these changes:

• Removed the proposal title in favor of the existing program name. Whether a program has a proposal or not it can have a name.
• Removed the proposal abstract and added a program description. This allows all programs to have a description, matches the name and description fields of Group, and removes the clashes-with-scala term abstract.

I expect the existing Proposal title and abstract to map to Program name and description. Does this sound okay or do we want to keep title and abstract and just move them to Program.

[toddburnside]

Seems fine to me. It will, of course, break explore. I'll check with Andy to see how he wants the UI to work.

[toddburnside]

Since the program name and description are used for the proposal now, should the API prevent editing of name and description if there is a proposal and it is Submitted or Accepted?