* premultiply blendModes, critical for compressed textures.

* sprite renderer batch blendmode fix

* derp fix

* move some stuff to table

* fix default export

* derp

* ternary and fix

* Refactor: extract variables & fix doc

* cosmetic

* Merge the changing of #3656

* Update SpriteRenderer.js

* Update SpriteRenderer.js

The `vertSize` is 5 , but the content is not `positionX, positionY, colorR, colorG, colorB`.

* fix SpriteRenderer for multiple webgl renderers, fix tests, add "withGL"

* isWebGLSupported renamed to withGL

* Added legacy option to webGL renderer

Setting ```legacy``` to true now forces VertexArrayObjects and
MultiTexture Batching to be disabled. We also store the variable on the
renderer just incase we want to use it to force settings in anything
else.

also added a test

* remove WebGLTests as they don't work on server

* Added extra param to Application

* Adds WebGL test for legacy

* Better check for WebGL in tests

it could offer a bit little performance gains.

* limit alpha number to 255. at rendering.

Avoid alpha flickering when it passes 1.0

* added space after comma

* Update annotation: `SpriteBatch to SpriteRenderer`

PIXP 4.x  no SpriteBatch

* more

Discovered that using this kind of code:

```const { MY_SETTING } from settings;```

means that changing settings properties has no effect as the objects
are being set before the user changes them.

* vertexCount is number of last used buffer. Always 0 in one "if" branch, 12345 in the other.

* fix for @GoodBoyDigital

* lints are still here :(

* Made const that are setting writable

* Moved more items to the settings

* add SpriteRenderer expectation

* destroy fix

* mock webgl

* added existence check prior to destroy

* allow immediate destroy

Also tweaked container to use renderer.flush instead of starting /
stopping objectRenderer.

* minimal texture bounds pass 1

* cheeky opts

* tidy up code

* create empty textures

* added empty texture

* couple more tweaks

* fixed empty texture issue

* fixed tweaked so id's sit on glTexture

means it should work on multiple contexts

* tweaked unbound textures

* tidy up

* upped max textures to 4 for mobile!

also sending state to tiling sprite VAO

* removed _activeTetureLocation

* tweaked eslint

* make sure buffer is bound

* updates based on @englercj review points

- Added vertexCount back in as it still yields much faster results in
iOS
- Tidied old comments
- Replaced i++ with ++i

* added prefer-const rule to .eslintrc

* eslint const autofixes

* manual let to const changes; lint free;

* added brace style 'allman' to eslintrc

* brace style, comment fixes and default arg

* brace style fixes

* more brace styles

* Point default args

* Point brace styles

* Observable Point default args

* more brace styles

* jsdoc comment style

* brace style

* brace styles and small jsdoc fix

* brace styles

* removed unneeded eslint inline comment

* brace styles; lint free

* some more es6 changes
- const instead of let if possible
- arrow functions
- string templates
- argument defaults

* object property shorthand

* some more es6 changes
- const instead of let if possible
- arrow functions
- string templates
- argument defaults

* Revert "Merge branch 'dev-es6-sb' of github.com:stbaer/pixi.js into dev-es6-sb"

This reverts commit 8d3af81, reversing
changes made to e8b9948.

* Revert "Merge branch 'dev-es6' into dev-es6-sb"

This reverts commit 3eeaf79, reversing
changes made to fb69536.

* Revert "Revert "Merge branch 'dev-es6-sb' of github.com:stbaer/pixi.js into dev-es6-sb""

This reverts commit c860228.

* fix RenderTexture, incomplete merge

* fix for text font properties

* reverted some changes

* checked out License, Readme and Contributinf from dev-es6

* editorconfig updated: 2 spaces for .eslintrc

* added eslint rule: spaces around fat arrow

* used eslint fix for consistent spaces around fat arrow

* don't allow scale.x or scale.y to be 0 in displayObject setTransform

* removed jshint comments (again)

* Migration to ES6 classes

* Migration to ES6 classes

* Migration to ES6 classes

* Migration to ES6 classes

* Using babelify to transpile ES6 code

* Adding babel-preset-es2015 in devDependencies

fixes #2841

* some stuff in renderer

* unused variable

* sprite bounds tweaks

* added a trimmed sprite test

* tweaks to tint

wrong place i know..