some jsdoc fixes; bit of cleanup

expose EventEmitter in utils

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

changed sgn to sign

ensure that sprite width and height are never negative

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

Added deprecation for uuid

Remove the rest of internal module coupling between packages

replace polyK with earcut

whitespace

expose async and Resource

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

add some space in the “sayHello” console.log ...

Add some padding and some ✰ stars ✰

fix some typos and jshint issues

mess with exports a bit

rework v3 to use EE3 instead of a custom emitter

Do not require raf polyfill, but instead add it to bundle ...

- Also including new version of polyfill based on all references listed in header comment.
- Allowing browserfy to wrap and pass global reference

fixed paths

Moved the Ticker class to extras because it's only used by the MovieClip class

add RAF polypill to utils index

Added requestAnimationPolyfill ...

silly IE9…

jshint housekeeping

Merge remote-tracking branch 'origin/dev' into dev

Fixed resolution issue with baseTexture

Fix #1308; use @photonstorm's blend mode test

Docs fixes, almost got rid of the globals

massive jsdoc fixes

Added usage example on some files and tweaked the MovieClip class

fix PIXI vs CONST reference

resolution prefix can now be a value other than 2

tweaked texture resolution for webGL ...

still needs fixing for Canvas