Updating copyright year
update Projector documentation
Update src/core/Raycaster.js

small improvement in speed.
update Raycaster documentation
add light documentation
add ambientLight documentation
Merge branch 'patch-1' of git://github.com/theo-armour/three.js into dev
Merge branch 'patch-4' of git://github.com/gero3/three.js into dev
Merge branch 'documentation' of git://github.com/gero3/three.js into dev