- three-controls now able to set autorotate from parent three-viewer correctly (as a test)
 * much improved css styling for controls : now most of them are re-styled checkboxes (ie, will work without stylesheets as well)
 * experimented with conditional styling (classes, css) using polymer
 * various cleanups
just some additional cleanup in various elements
- various additions and fixes:
 * added settable shadows & grid
 * gridHelper is a port from coffeescad: one BIG issue though: any attempt at rendering labels from canvas (as texture) fails (see note in gridHelper code)
 * updated CombinedCamera & OrbitControls to custom "z-up" version
 * added updateObjectVisuals helper as well (from Coffeescad's visual helpers), but needs a cleanup !