Started changelog
Continued CHANGELOG
Added 'prepublish' target to Gruntfile.js

Builds versioned xml3d.js files
Updated build README.md

Updated from ant to grunt
Camera controller: No picking during navigation
Merge branch 'release-4.8' (early part) into develop
Bumped version and updated README.md
Merge branch 'release-4.8' (early part) into develop