Adding boolean attribute "transparent" for files with transparency. 

http://stackoverflow.com/questions/18444939/define-transparent-material-in-json-model-format-3-1
Delete THREE.Math.PI2

Nothing use this in this repo
Depolluted primitive generators.
Fixed more bad inheritance usage code.
Simplified BinaryLoader.
Fixed example with .parameters change.
Updated builds.
Projector: Fixed triangle culling breakage.
Updated builds.
Merge branch 'fix_doc_link' of https://github.com/gyohk/three.js into dev
Moved wip classes out of src.
Clean up.
Updated builds.
Fixed misc_geometry2_sandbox.
CONTRIBUTING: Smaller font size for message.
WebGLRenderTarget: Added setSize().
Albeit renderTargets can't currently be resized.
Updated builds.
Added new Geometry tests.
Update BufferGeometry.html
Editor: When using JSONLoader use first material directly if materials array has only one item.