Update planner.py

Bug Squashed: Redirected to '/event/%s/%s/' when it should have been '/event/%s/%s' . This caused an error 500 to be displayed since the view was not found.
Update newevent.tpl

Bug Squashed: ... value="'Needs Attention" ... <---- sneaky little ' . ' has been removed.
Update constants.py

Bug Squashed: cannot concatenate a string with an int, called str(num) to fix.
Update planner.py
Merge pull request #29 from CKnotts/master

Minor bugs fixed