First round of edits for Stage Name

The Stage Name should be the defacto display name.  There are now two
new columns to user "Display Name" (always full) and "Stage Name"
(optional).  The Display Name defaults to Stage Name, using First/Last
as a backup.  From here out, if you see the real name when a stage name
is in the user's profile, it's a bug.
Fix bug in room sign up

When DB and room code fall out of sync, you can't signup rooms.  Made
this more standard, not that the standard is great - there are two
areas to update - the schema and intercon constants.
Changes to display of calendar

no more 24 hour clock, shorter rows, and removed attendee displays from
cells.