Added clarification about 10 hours for the cost structure
Merge branch 'master' of github.com:professor/whiteboard
Moved arel into model
Added link to view assignments
Merge branch 'master' of github.com:professor/whiteboard
Merge branch 'master' of github.com:professor/whiteboard
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Ignore index tank searches for travis
Merge branch 'master' of github.com:professor/whiteboard
Cleaning up
Kaushik did really awesome work, but I couldn't help make a few changes