update for performance

use the new displayObjectUpdateTransform for better performance
Fixed round pixels

Also added to webGL renderer
Added mipmap option to baseTexture
-[SPINE] Fixes Atlas attachment loader bug in which it would try to load the name of the attachment as a sprite instead of the name of the sprite.
-[STRIP] "padding" renamed to "canvasPadding" to reflect the fact that it is only used in canvas mode + canvas padding is calculated using the world transform to make sure it looks right at any scale.
-[SPINE] Spine loader uses a canvas padding of 1.5, optimal for most use cases.
Merge branch 'dev' of github.com:GoodBoyDigital/pixi.js into Trompo-SpineUpdate
Buffer optimization using typed array views

thanks bchevalier!
* Fixed Buffer Optimisation issue: red and green colors were inverted
Merge pull request #1239 from bchevalier/bufferOptim2

Fixed Buffer Optimisation issue: red and blue colors were inverted
Merge pull request #1233 from TrompoGames/Trompo-SpineUpdate

[SPINE] Spine fixes + strip canvas renderer improvements.
Fixed tilingSprite canvas transform bug
Merge branch 'dev' of https://github.com/GoodBoyDigital/pixi.js into dev

Conflicts:
	src/pixi/Pixi.js
version update to 2.2
republished files
Cleaned and tidied up the examples
removed some legacy code
updated the test case
Merge pull request #1218 from kambing86/patch-2

update for performance
Merge pull request #1241 from alvinsight/dev

Spring clean (well, winter clean) of the examples