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

jshint housekeeping

Renamed The DrawModes consts to be more in line with the rest, fixed my awful typos

Updated deprecation file

Docs fixes, improved the consistency of the deprecation, thanks @englercj ...

Also added a comment on the bitmap font parser, will leave the change
until we find a new caching system

Moved the deprecation warnings to their own file, thanks @drkibitz for the suggestion