bump version to 2.2.8

fix an exception when tilingsprite is destroyed without being rendered

merge #1514 into v2.x

Merge branch 'master' of https://github.com/ivanpopelyshev/pixi.js into v2.x

Merge branch 'master' into v2.x

Fix pixi.js drawOrder. Also, skeleton.drawOrder now is permutation of integers.

merge #1510 from @sfentress

https://github.com/GoodBoyDigital/pixi.js/issues/1522

Sorry for this new PR, but now it's very better. ...

* Add the global position on all changedTouches object
* Best way to gesture the double tap event on touchstart and getting each position.
* add optimisation and speed up the code
* add compatibility support for CocoonJS
* add more optimization

Add docs on the new param globalPos

Fix thne name of the param

Give the possibility to get the local position with your own global position. ...

Save the global position in the changedTouches event object.
This feature give us the possibility to manage multitouch event in the save object ex: Resizing Gesture event with two touch moving in the save time.

bump version to v2.2.7; add new builds

bump version to v2.2.6

fix #1429; add some extra info to the progress event

fix #1435; set batch context on change

Add back in a fix by @photonstorm

Merge branch 'chalgoman-patch-1' into v2.x

Merge branch 'nikeee-master' into v2.x

Merge pull request #1398 from amadeus/rendertexture-fixes ...

RenderTexture fixes

Change frame to be optional

Fix type of context

Add return types

Add method description

Add return for docs

Fix JSDoc property

Add separate event handler for touchcancel/touchleave ...

Now I've separated the handlers for touchcancel / touchleave, because in previous commit I've attached the touchEnd handler, but that wasn't correct - when touchcancel/touchleave is triggered, tap event must not fire.

Add listeners for touchleave and touchcancel.

Fix WebGLFilterManager to use renderSession.resolution ...

This will allow filters to at least fill up the desired screen real
estate.

There's still a further issue in that filters don't actually scale
themselves based on the resolution, however.

Fix RenderTexture and resolution compatibility ...

Fixes the bizarre drawing of RenderTexture's with a resolution greater
than 1.

I also noticed some incompatibilities between how properties were set
both on RenderTexture instantiation, and when the resize method is used.
I fixed these as necessary.