Merge pull request #20 from xiekevin/master

Improved upon Rushee Interview Time Scheduling
Restyled interview slots index a bit, added actionmailer confirmation email for interview sign up, changed rush page to reflect interview slot information, changed navbar
Remove add interview slots for now
messed up akpsi header name
Add the interview thing back into prod
Change default mailer to rush@calakpsi.com
Implemented Mass Rushee Emailer