Box2D.js file and PhysicsSystem.js added
Working on network manager.
Added pixi to vendor loader.
PhysicsSystem added
Merge branch 'master' into Justin
Additional work on NetworkManager.
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
Finished merge.
Added 2 box2D component files
Removed Impulse component
added Rectangle entity and added more comments
Preparing for merge with master
Fixed comments
Removed old version of Box2D.js
Starting to integrate Network Manager into Scene.