Box2D.js file and PhysicsSystem.js added
Added physics engine
Merge branch 'Joe'
PhysicsSystem added
Merge branch 'master' into Justin
Merged rendering system into master
Occupancy Grid setOccupied now working
Updating gitignore
Removing templates from repo
Removing docstrap template
Minor restructuring
Merge branch 'master' into Justin
Added simple rectangle constructor
Updated structure, added provide statements for PhysicsSystem in scene/system
Fixed one bug: incorrect provide
small change to physicssystem
Added 2 box2D component files
Removed Impulse component
added Rectangle entity and added more comments
Preparing for merge with master