#637 Schedule comments

[Matthew Hauer]

The current schedule system uses both // and # for comments. Though based on the cron format, it seems superfluous to use two different tokens for comments.
Removing the use of # for comments in schedules would prevent programatically defined schedules from using comments ~ though those schedules to use C-style comments outside the strings. The token would also be 'cleaned up' within the GLM syntax, focusing its use on macros.

[David P. Chassin]

• milestone changed from Unscheduled to Version 3.0 RC 1

[David P. Chassin]

• status changed from new to assigned

[David P. Chassin]

• owner changed from dchassin to jcfuller

Not sure we want to do this. Please confirm if desired.

[Jason Fuller]

Let's leave this alone for backwards compatibility.