Dynamic buffer attribute

Premultiply the clearColor if renderer.premultipliedAlpha is true

Changes suggested for #5964 resolves #5042 and supersedes #5952, #5953
and #5964

Dev sync

Fix for type in ColladaLoader: kinematicsModel is already defined in line 11, but in line 28 it should be called kinematicsModels (plural) like the visualScene/visualScenes the line before it.

change *copy; to ©

Dev sync

Feature: THREE.ShadowMapViewer

"composer" is never used

Moved ShadowMapViewer's camera back so that its near plane is not passing through the world origin, as per @WestLangley's suggestion.
Fixed some code formatting.

Removed preventDefault() from mouse event handlers in editorControls

Blender exporter: `opacity` should be `transparency`

Conflicts:
	src/renderers/shaders/ShaderLib.js

From previous label of 'Conflicts'

added new function readRenderTargetPixels to WebGLRenderer

Builds for all OS now available:
https://drive.google.com/folderview?id=0BzudLt22BqGRbW9WTHMtOWMzNjQ#list

Remove material.ambient, no need for a secondary surface color just for ambient light

# The first commit's message is:

Changed ShadowMapViewer's camera to have a positive near plane, as per @WestLangley's suggestion.
Storing renderer.autoClear before setting it to false when rendering the ShadowMapViewer and then restoring the user's autoClear setting, as per @WestLangley's suggestion.
Added ShadowMapViewer.update(), needed when manipulating the ShadowMapViewer's size or dimension coordinates directly without calling .set() on either.
Changed renndering of the text label to not happen if a light's name is empty.
Changed size members from x,y to width, height.

# This is the 2nd commit message:

Forgot to finish comment.