* 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 :(

# Conflicts:
#	src/core/Shader.js
#	src/core/renderers/webgl/filters/Filter.js
#	src/core/sprites/webgl/generateMultiTextureShader.js
#	src/extras/webgl/TilingSpriteRenderer.js
#	src/mesh/webgl/MeshRenderer.js

* 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..

This fixes an android issue where texture id attribute is not defined.