Jacob1's Mod version 24.0

Major rewrite of tabs, and all the official version updates that came within the last month.

Version 24.0 7/12/13
Decrease tool strength by half, holding ctrl slows it more and holding shift
speeds it up. Re-arrange tools menu a little and update the tool and wall
descriptions. A ton of simulation updates and bugfixes from tpt++. Change
internal version number to 88.0 (doesn't affect saving). ctrl+z works better
and goes back to the last time you drew something or opened a save. Overhaul
of tabs. They now save more info inside them, and they have their own thumbnails
and names. Right clicking a tab will delete it, and you can use the reload
button to reload a tab. Ctrl+s to save it and set a new reload point, ctrl+n to
start a new tab, 't' to open / close the tabs menu. If installed, hitting "open"
on the website will open the save in a new tab. Fix tpt.moving_solid. Fix
issue where multiple comments could be highlighted at once in save preview and
console. A bunch of fixes relating to walls and photons with flood fill. Time
enabled by default in HUD.