Moving Platform, Hero, Ladder, and Goal Sensor

Quick sloppy attempt at putting everything together. Need to separate
Box2d from game logic For readability. Game code should be simplified
into a create world/blocks section, the keyboard events, updating forces
with keyboard events, and rendering. For now the rendering is only an
Box2dweb debugdraw method.
Cleaned up Project

Project Cleaned into the essentials. Renamed Box2dTrial to
BlockBuilderMain. Demo moved to the box2d folder. IPNeeded removed.
Keypress and, test moved to test folder.