Added Edit and Delete functionality on the topics tab to add and delete topics
Modified code such that both instructor and student topic page renders the page in sign_up_sheet
Modified code such that both instructor and student topic page renders the page in sign_up_sheet
enabling instructor to edit a topic and using the same partial as the sign_up_sheet
fixed bug for super admin
Fixed delete topics functionality
fixed flash messages
Consolidated student and instructor action field values for Topics
Added images to edit/delete topic links, and misc. changes
Fixed update/delete topic redirection
fixed redirection after creation of new topic
placing the missing database.yml.example file back

doing so as per request by Andrew Kofink
Made alignment change for super-administrator, and removed the commented old code as advised by Andrew.
Merge remote-tracking branch 'origin/rails4' into rails4
Merge branch 'rails4' into local1453
db change, just ignore
delete   require 'graph/graphviz_dot'