- added Three.js detector to fallback to canvas renderer
- moved useless sphere out of the viewer element and into the demo itself
- lib updates & related:
 * polymer updated to v0.0.20131010
 * three.js updated to v61
 * three.js "wrapped" lib removed: was useless
 * three.js min works out of the box if removing the 'strict' flag
 * three.js FULL is used for now , because of issue : https://github.com/Polymer/polymer/issues/316 : temporarly fixed by modifying three.js and adding the unwrap() calls
 * updated viewer, combined camera etc to be compatible with latest three.js