Merge pull request #2 from mrdoob/dev

Update Dev
A simplied version of the total Reayleigh scattering to works on browsers that use ANGLE
Adding adaptive tone-mapping postprocessing pass and example
Cleanup to remove builds.
Cleanup to remove builds
Okay, really deleting the files this time.
removing remaining build files
Reverting Three.js
Adding different environment mapping types including equirectangular mapping and sphere mapping
Removing three build file
Replacing indentation spaces with tabs
Merge branch 'dev' of https://github.com/mrdoob/three.js into environment_mapping

Conflicts:
	build/three.js
	build/three.min.js
Removing build files
fixed THREE.PointCloud rendering
Fix Sky Shader. Should now work on Windows and Mac (#5602)

- use simplified Rayleigh function for performance and ANGLE
- add back original in case anyone wishes to experiment wavelengths
Changed no. of segments of circle and cylinder

Line 101 : 32 segments instead of 8 as it gives the cylinder a more realistic look.
Line 123 : 32 radiusSegments instead of 8 as it gives the cylinder a more realistic look.
Merge branch 'dev' of github.com:mrdoob/three.js into environment_mapping

Conflicts:
	build/three.js
	build/three.min.js
Merge branch 'dev' of github.com:mrdoob/three.js into adaptiveToneMappingHDR

Conflicts:
	build/three.js
	build/three.min.js
BloomPass: Fixed Typo. Fixes #5639.
Merge pull request #5634 from akshaynagpal/patch-1

Changed no. of segments of circle and cylinder