Bid/performance management

Several bug fixes in the area of bid & performance submission and
management.  Key areas:
- new table for ActHistory to let applicants describe other big show
participation
- added a way to add length of act in MM:SS
- true separation of privileges and code for Act vs. Class/Panel
submission
- serious rework (not 100%) on performance form to reflect current
submission
- various bugs in Bid Form consistency relating to old fixes (CLASS
DAYS vs. CON_DAYS
drop everything

Fixing a drop table issue in database - it wasn't cleaning up after
itself.