Graphics class has a property called "isMask" which is never actually set (#4609)

Documents events for DisplayObject, renderers, Texture and BaseTexture (#3922) ...

* Documents events for DisplayObject, renderers, Texture and BaseTexture

* Converts to single-line event syntax

* Adds mouse/touch/pointer events for DisplayObject, fixes typo, adds interactive and interactiveChildren

* Added missing params on touchcancel and pointercancel

* Better helper docs for DisplayObject and Container

* Fix lint

* Removes mixin doc for PIXI.interaction.interactiveTarget

* Added more explicit types for `originalEvent`

* Fixes lint issue

Fix preparation of destroyed items (#3802) ...

* Added isDestroyed to DisplayObject, BaseTexture. Don't prepare destroyed items.

* isDestroyed -> _destroyed, marked as private

fix mask type (#3607)

Improved documentation ...

Class member documentation improved via removal of unnecessary @memberofs - more members now show up in the docs.
Class getter/setter documentation improved using technique above, and also by removing documentation for setters. Documentation was only showing the setter docs, whereas the getter is where the important information is. JSDoc maintainers themselves recommend just doccing the getter jsdoc3/jsdoc#973
Documented a few classes to let devs know that they are automatically created by PIXI and added to renderer.plugins, like interactionManager and prepare

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

* Made const that are setting writable

* Moved more items to the settings

spelling

Rename remaining references to AbstractFilter in jsdocs

context

fix for #3027

updated some doc comments (#3038)

clean up to be specific

Huge refactor to match a new shiny eslint file.

merge #2956

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

bounds and transform for invisible containers.

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)

removed old jshint comments; replaced jshint in CONTRIBUTING.md with eslint

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

Fix process interactive (#2855) ...

* Added 1 extra check in the procesInteractive to check if children exists before attempting to call children.length
this would've thrown an error if you remove stuff in an onMouseClick for example.

* smaller diff maybe

* changed remark

* Better and faster fix
set interactive and interactiveChildren to false on the DisplayObject.destroy()
this way no extra check is needed in the processInteractive function.

Destroying a DisplayObject will remove itself (#2809) ...

* Destroying a DisplayObject will remove itself

* Container removes children before destroying

* Fixed destroy order

* Removes extra whitespace

* Updates with Ivan's suggestion for Container destroy

* Removes listeners when destroying

* More verbose destroy comments

* Typo

added enabled to filters (#2798) ...

* added enabled to filters

* lint that code!

fixes for cacheAsBitmap

fix call to getBounds (#2788)

fixes #1698 ...

added unit test to check too

renamed bounds builder to bounds

bounds-tweaks (#2760)