HemisphereLight#clone() should create a new HemisphereLight, not a PointLight
Fix for Face4-less SubdivisionModifier
- using option 2 as discussed in #3663
- done using old face4, then converting it to face3s after conversion
Merge branch 'master' of https://github.com/zz85/three.js into dev
r61dev
Updated builds.