Version 2.1.0

Handling of printer status added (status text, model name and hard-coded 'hp'
icon, inks and trays).

Re-structured infobox.pl to do all non-computer status checking from a "master"
instance of the script. This "master" currently checks and reports whether any
computer goes down for more than 5 minutes, and checks the status of printers,
cameras, and servers which cannot have a computer script running. The plan is
that this "master" will re-initialize the computer "slave" scripts if they
stop reporting for 30 minutes on a computer. Only computers now report their
uptime value ("This computer is up since datetime X"). Up/down states should
now be correct.

Moved images to img/ subdirectory and shrunk them to 24x24. Made a 'hp' icon.

Progress bar style fixed and given another gradient background for the '%'.

Moved the session type code entirely to the JavaScript side and fixed it.

Fixed errors that can be displayed if it tries to show a tooltip before you
receive the first data.json response.

The tooltip is now 800px wide to decrease required eye movement on computers
on the left side. User session data no longer needs to take two lines per
session. The tooltip is now below computers instead of above so they don't
go off the top of the page.