Deleted duplicate setting of the grid pattern

There was a second call to the grid setting function in
the scheduler.mako. This has been fixed.
Paired by Michael and Richard
Added event handlers for both the datepicker and the hour dropdown. Paired by Richard and Michael.

Event handlers for the datepicker and the hour dropdown are in place, meaning we are in position
to pull the available five-minute slots for a given hour on a given day. (Feature #90)