More work on visual editor:
 * note: boolean/csg disabled  for now, going to get cleaned up
 * more notes regarding connectors added
 * added experimental face normal tracking on pointer hover: this
will be used as part of "inteligent" cursor and snaping parts to
each other, connectors etc
 * updated transform controls to match changes in recent THREE.js
 * other minor changes
- updated entries in shape-creator element