app, table: Initial multi-table support (see below).

- Userverse has become Allverse.
- New Userverse is per-user domain.
- Tableverse is now per-table.  Default table, "Antechamber", is created/joined on login.

Not yet implemented:
- Switching tables.
- Creating tables.
- Changing table visibility.
- Deleting tables.
app: Fix width of location status widget.
app: Add O.isGM()
allverse/table: Fix bug in table.remove()
allverse/user: Fix bug where current table wasn't properly exposed to get().
app: Reduce chattiness.
app: Record table in user thingy on table join.
login: Fix breakages due to userverse->allverse rename.
app: Documentation fixes.
allverse/user: Handle table sub key in initial creation properly.
oghma.rb: Add support for removing a table db.
allverse/table: Remove table database on local remove (but not unload or remote remove).
all, status/table: Add table status widget.  (See below)

Supports switching, creation, deletion, and visibility management.  Has placeholder but not implementation for pulling.
allverse/user: More accurate documentation.