Added example to show off logarithmic depth buffer mode
Improved logarithmic depth buffer example
Bigger things, better color picking
Made the example prettier and easier to understand
Added logarithmic depth buffer code to ShaderChunk with references in ShaderLib
Fixed shader whitespace to comply with new style

Conflicts:
	src/renderers/shaders/ShaderChunk.js
	src/renderers/shaders/ShaderLib.js
Re-merged logarithmic depth buffer code into new file structure
Merge branch 'logdepthbuf' of https://github.com/jbaicoianu/three.js into dev
Updated builds.