refactoring spritebatch renderer

export shader manager

move StripShader to extras

fix some browserify paths

move object renderers to a webgl folder of feature

all working now ...

fixed up a few issues with objectRenderers

bunch of updates ...

Fixed bracket issues
Renamed webGLSpriteBatch to SpriteRenderer
Renamed / refactored webGLGraphics to GraphicsRenderer
Tweaked Shaders default attributes

regex replace braces to newline

fix some require paths that changed with some refactoring

fix some jshint issues

move primitives back into core

merge #1113, reuse code in autoDetectRecommendedRenderer

Lots of core renderer-related updates ...

- Removed `Stage` completely from core lib, in favor of directly rendering
  DisplayObjects
- Removed rendersession from core lib
- Rewrote WebGL managers to be more DRY and have a common base
- Rewrote Shaders to be more DRY and have a common base

fix require paths for browserify

initial move to new module folders