Box2D Extension
Turned the Box2D collision system into an extension.
Extension Identifiers
Fixed a few extension names that were not showing properly.
Box2D Duplicate
Duplicated the Box2D physics extension, so theres the one for Studio
compatibility and the one for ENIGMA's own implementation.
Function Renaming
Renamed the box2D extension functions to short hand prefix b2d_* and properly
named fixture functions body_*
Bug Fix
Fixed a bug with pregenerating of a world.
Studio Physics
Fixed studio physics extension pregenerated world.
About Information
Changed the about information to be less vague.
Merge pull request #149 from RobertBColton/master

Creates extensions for physics systems to allow augmenting the current collision system.