RegistrationsController#create re-renders the form instead of redirecting, so user doesn't lose what they've entered.
Took out RegistrationsController#update, since all it was doing was calling super.
Took out stubbing of user save, because I actually want to check that save is doing the right thing.

removed user#aspect method.  all aspect creation should be scoped through the user -> aspect association proper: user.aspects.create(opts)

profile photo uploader is now a standard form file element.  Upload new image through people#update, which calls current_user.post to do so.

photos do not require an album.  uploading files on a user's photos#index page will post to all aspects.