E801_Refactoring and testing assignments_controller

OSS Project - Fall 2013
Team : Vinay Sheshadri, Namita Shubhy, Ankita Kalantri
Unity ID: 
Fix for timezone issues	
Fix for linking topics tab
Changed review to reviews
Fix to teammate review rubric
Refactored copy method in assignment controller
Renamed set_up method to Set_up_assignment_review
Fixed large string issue in timezone - due date picker
Added Capybara tests