Investigate integration of a physics library with the HAPI

[sriGanna]

There are several active ports of BOX2D (the library that Fisica is based off):

• Box2DJS - "converted from Box2DFlashAS3_1.4.3.1 in an automatic manner"
• Box2Dflash 2.0 ported to JavaScript - "one big nasty hack that just happens to work"
• box2dweb - "a port of Box2DFlash 2.1a to JavaScript. I developed an ActionScript 3 -to- JavaScript converter to generate the code"
• HBehrens/box2d.js - "a JavaScript Version of Box2D 2.1a" (Added Nov 21, 2011)
• kripken/box2d.js - "a direct port of the Box2D 2D physics engine to JavaScript, using Emscripten"

Determine which one is best suited for our applications

[sriGanna]

Planck.js (https://github.com/shakiba/planck.js) was chosen as the physics library because it was created to make a Box2D port that is readable/ easier to use for JS.

The physics integration involves the porting of the haply specific classes in the Hapi-fisica port