First revision of prof pages
Finished editing after Sandy's suggestions

Updated with Sandy's second round of suggestions

Fixed according to Mack's suggestions

Can now toggle expanding reviews on the prof_page

Show course bars on prof pages again
Added borders around each course on prof_pages

Fixed course borders

Prevent course bar from changing width on prof page
Added some higher-level UI elements
Removed sign_in references due to #182
Some minor styling fixes

Address David's high-level UI concerns
Final changes after David's pass at it, mainly cleaning up before merge