Look up user's person by biola_id instead of by relationship
The relationship isn't always getting set for everyone for some reason. So this will be more reliable. This should probably be made the default way to look up the associated person in buweb. I used `find_person` so it didn't conflict with the already existing `person` method.
Merge pull request #60 from biola/fix_profile_link

Look up user's person by biola_id instead of by relationship