1104 add useraffiliation to the base user model

[jchate6]

This is the basis for code to add profile information to a User for tom_base.

Current issues:

• If Users already exist without an associated profile, the profile page will break.
• The Profile model should be able to be overwritten by a User
• Profile Fields are not properly displayed on the profile page via "verbose name"

Solutions to nonexistant profiles:

• Catch RelatedObjectDoesNotExist: User has no profile. error and create profile.
  • If we want to use the signals, we can do this in save_profile. This has the benefit of causing every new user to automatically have a profile, and updating all old ones automatically as they log in. Downside is using signals which adds new code.
  • Otherwise we create the new profile when accessing the profile page in user_extras. Has the benefit of no "new" code, but feels like the wrong place for this type of functionality.
• Allow users to not have profiles:
  • Build all code under the assumption that some users do not have profiles. Seems hard and surprising for users who want to access profile information for themselves in custom code.
• Use signals and add management command that needs to be run to create profiles for existing users when updating to new version. Seems like an unnecessary burden on users.

[jchate6]

We changed the user creation form to a formset, so we need to include the profile ManagementForm data here or it will get angry.

[jchate6]

I'm pretty pleased with the state of this PR.
If you approve I'll push off the unchecked item above (exposing the profile to be customized by users) to a future issue.
It might make it into this sprint, depending on how the Demo App work goes.