fixed persona tests
they were pointing at the wrong thing, so now they're pointing at the right things
assert Persona.list throws when it has no options
add scopeUrl to Persona Model
putting the delete calls in a better spot
user_id and group_id don't belong on query
change logic so that it's not expecting user_id or group_id to be on the query object
Merge pull request #121 from sportngin/personas-for-user

ScopeUrls on Persona Model