Commit 04/06/2014

Added 'users.html' which works like 'rooms.html'. Users will be able to
find other users and click their names to send private messages or view
their profile. They are currently ordered by their ID in the global
array.

A new tab has been created for the SimpleGame designer. It is simply a
map control. Each client gets their own Z level allocated to this, and
other clients will be able to check in on others' creations simply by
moving Z levels.