use a Jello.Vector2 to determine extent of the Canvas and Camera
removed canvasWidth and canvasHeight in favour of extent
removed explicit canvasExtent parameter in Camera
removed width and height properties in Camera in favour of extent
moved Path to its own subdirectory
adjusted includes for path.js
use Vector2.set instead of copy in AABB
removed the support of aabb as a parameter for expandToInclude
formatted define clause in AABB
refactored calculateSpringForceVelAVelB in VectorTools
removed unnecessary Vector2 constructor in Jello.ClosedShape
ease up Vector2 instanciation