Fixes intersection when a matrix node got several children
Removes useSourceUrl option
Merge pull request #126 from cedricpinson/bug/intersection-several-children

Fixes intersection when a matrix node got several children
Fixes wrong weight middle array nbsample correction
Adds Pascal Coeff Cache
Merge pull request #134 from cedricpinson/bugfix/postprocBlur2

fix gauss blur incorrect middle array computation
Makes grunt check pass because PolytopeIntersector.js
Fixes Lights behaviour and adds tests
Fixes bad character utfx in Quat.mult
Tests to see if travis run grunt check
Merge pull request #135 from cedricpinson/feature/OsgShaderLightFix

Fixes Lights behaviour and adds tests
Adds codepen tutorial to osgjs (allows for quick visual tests when making osgjs core change)