Fix for bug in 2D -> falling through tiles

Steps to reproduce:

Open demo "platformer" and add following properties to "player":

  * gravity: 1.9999897453
  * points: [[-5, -5], [5, -5], [5, 5], [-5, 5]]

Expected result: Changed properties of the player object

Actual result: Player falls through tiles
Merge pull request #22 from izidormatusov/master

Fix for bug in 2D -> falling through tiles
Initial Gitignore
Child sort support and flip support (untested)
Separate out stage loops, fix gridding
Platform example
Merge branch 'master' of github.com:cykod/Quintus
Added collision loop for sprites
Fix to joypad
Issue #26 fix - set default repeater p.type to 0
Added example back in
Quintus Release 0.1.2
Fix to JSHint errors
Quintus Release 0.1.3
Updated grunt to 0.4.1
Quintus Release 0.1.4
Readme Fix