fixed settings not being respected (#3315) ...

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.

Moves constants that are actually settings (#3298) ...

* Made const that are setting writable

* Moved more items to the settings

spelling

Added prepare hooks for Text.

fixes #3055

Smaller default texture size for text (#3036)

clean up to be specific

Huge refactor to match a new shiny eslint file.

Always clear Text Canvas via clearRect

Prefer const (#3002) ...

* 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

Merge branch 'dev' into dev-es6 ...

# Conflicts:
#	src/accessibility/AccessibilityManager.js
#	src/core/text/Text.js

some more es6 changes (#2969) ...

* 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)

Small updates to fix some es6 conversion issues ...

- Removed some require references that were preventing mixins like
interaction from working.
- Fixed Text

Replaces jshint with eslint, using babel in loose mode

Update imports and exports, getters and setters

Disallow the use of `var`

Implementing classes using the new ES6 syntax (#2936) ...

* 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

Couple of changes to allow cocoon js to play nice with pixi ...

Do not create touch hooks for accessibility - this stops cocoon from working
Do not use gradient text, just use the first colour listed in the array - cocoon displays text with gradients as black otherwise

fixes #2871 ...

Text width was being incorrectly reported when padding is used

fixed incorrect height setter for text ...

also added a unit test

Updated docs example with fontFamily and fontSize (#2861)

Fixes #2840 (#2847) ...

* Fixes #2840

Default destroy options for text are now all true.

* tweak the tests

passing unit tests..

* simpler code

thanks @bigtimebuddy !

Update Text.js (#2837)

A few Text updates (#2799) ...

* text now matchs renderers resolution

much cleaner!

* tweaked textStyle to no longer use events

its a little lighter!

* padding now applied to width as well as height

bounds-tweaks (#2760)

Dev bounds refactor (#2729) ...

* getBounds refactor

* another unit test

* added get local bounds

* local bounds stuff

* bound tests and tweaks

* added Ivans recursive function back in

* updated toLocal / toGlobal

* added toLocal and toGlobal tests

* linting

* tweaked tests

* fixed text bounds

added test for it too

* test tweak for text

* more tweaks to make it pass on server

* test tweak

Merge pull request #2722 from themoonrat/gradient-text-resolution ...

Gradients now work with Text resolutions other than 1

BaseTexture used for text now reports correct realWidth and realHeight (#2720)

Gradients now work with Text resolutions other than 1

text padding possible fix (#2709) ...

* fastrect mask test

* text texture fix. I didnt know that there can be negative trim. I'm sure it will affect our filters, getBounds() will be incorrect

* small fix

* Text padding fixes. works like v3