particleContainer deprecation

render texture now 100% compatible with v3

added generateCanvasTexture to graphics

render texture deprecation check

adde generateTexture to deprecation

first round to clean some jslint errors

removed unfinished parts ...

removed old shader code

fixup some docs in deprecation

Massive documentation update; fixes many issues. ...

Issues fixed by these documentation updates:

- #1973, fixed filter and BitmapText property docs
- #1908, fixed type reference links
- #1856, fixed name of MeshShader

Depecrate `PIXI.math` namespace ...

Access math members from PIXI when outside of core, require the math module directly when inside of core.

style fixes

Fix another paste error

fix paste error

uuid is a misnomer, this is not universal, but it is unique in the scope of pixi ...

Added deprecation for uuid

Remove internal filter aliases on PIXI.filters, expose on PIXI instead as PIXI.AbstractFilter ...

These are undocumented and unecessarily create a tight coupling between core and filters where the filters package is actually responsible for exposing an internal core module.

made deprecation hidden in docs

add some missing deprecations

added setStyle to deprecation

added scaleModes to deprecation

uncommented console.warning line

added blendModes to depracation

added more depracation API

remove needless export

Move items into their namespace ...

This commit also:

 - fixes some dangling whitespace,
 - fixes some incorrect docs in extras/mesh,
 - moves Text to core
 - moves BitmapText to extras
 - moves math constants to const.js

updates to deprecation module, docs, refs, and errors

Fix all the remaining jshint stuff

Tidying up some stuff

Added getter setter to the deprecation so you can extend

Fix a typo from "AssetsLoader" to "AssetLoader"

small typo fix