[#544] fixed the `maxChildren` and `maxDepth` parameters, and increased `maxChildren` to 8
[#544] added a collision handler and made the emoji bounce when colliding
[#544] keeping this one for later (probably 1.2.0)
updated CHANGELOG and README
make sure the body bounds are properly updated when manually adding objects

Note : this was working before, this is rather a safety net, if multiple
shapes are added manually :)
[#544] changed to a ellipse shapes as we are dealing with round emoticons ;P
Revert "[#544] changed to a ellipse shapes as we are dealing with round emoticons ;P"

This reverts commit 6b83b551fc00f903c15f210879c794ae2d85cfcd.
[#544] changed to an ellipse collision shape as we are dealing with emoticons
Fix jshint:afterConcat task
Create me.game.defaultCollisionMap with proper bounds
[#548] Fix default Body bounds when a collision shape is not explicitly defined.
directly refer to `api when accessing these properties, shorter and faster
[#544] added a `insertContainer` function to the quadtTree (faster insertion) and added back recursion case with child containers

Not sure this would work properly though (as children position is
supposed to be relative to their parent container). It seems however
that this was the case before as well ?

https://github.com/melonjs/melonJS/blob/1.0.x/src/renderable/container.js#L557
[#544] debugPanel : properly draw regions when debug mode is enabled for the QuadTree

now, alpha value for a region is 0.4 maximum, with 0.4 being used when a
region reached the maximum of children authorized (0 when threre are no
children within the given region)
[#441] Fix bad merge
Small fix and tweaks to the platformer example

-Remove the now useless collidable flag from the HUD
- Rather used setCollisionMask to disable collision
small update too for the whack-a-mole example

same deprecated flag removed
Clarified documentation for the `setCollisionMask` function

to indicate how to properly disable collision for a given object
closes #550 - adds own canvas to calculate ratio
Update exceptions to use the new `me.Error` class