Add descriptive text above search bars
Add 'available' and 'hidden' booleans to Profile
Search tweaks

- extend alphabetical sort to include first name (not just last)
- remove 3.7 GPA filter
- exclude hidden profiles from search
- change default sorting of opportunities to newest
Acknowledge Career Services Center
Ensure select fields are sorted on Create Opp. pg.
Remove grades from courses
delete cruft
Merge pull request #50 from ucsd-ra/bug-squashing

Bug squashing