E801_Refactoring and testing assignments_controller

OSS Project - Fall 2013
Team : Vinay Sheshadri, Namita Shubhy, Ankita Kalantri

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