Anti-Lock Brakes

Here's the first major release of the plugin! I got in a coding frenzy, so I added in almost every planned feature!
New features:

• Completely Redesigned Part!
• Key support! Now the mod works as the brakes do with the keyboard, except you hit the "Mod" key with "B" (by default this is Alt).
• Electricity Draw! Now the part pulls 0.3 electric charge per second when on. 
• GUI editor! Now, you can right click the part and open the GUI which allows you to modify the rate at which the ABS system toggles. By default it is every .1 seconds.

Stuff to come:

• Toolbar support. I was hoping to get this in for this release, but I was having crazy problems with it and just commented everything out for now. The icons and everything are here though.