Don't show "Presented by" if there is no presenter

like in a show…
Only show ticket links when they are active

a result of reviewing show setup.
Stole show event list test

from the website…
Class reject/no decision clears schedule

When a class is rejected or moved to no decision, the schedule and any
allocations are cleared out for this class.
Merge branch 'jpkdb'
Closes #163 and #152

Deduplicate troupe lists on profile, while preserving both link to
contact and link as troupe member.

I also added a Troupe View - members can view, contacts can edit.
Otherwise owner contact will change with each edit.  Added privilege
check for the same thing to the edit_troupe field.