proper sphere for Physics2 example
fix orbital controls (helpful in dev/testing) camera getting in app.js . better system to have a good free cam for dev / scene view purposes todo.
ThreeView: remove bad check of three objs having only one child. borked in Physics2 where a single entity (in ThreeView a Object3D) has both light and mesh, works correctly now.
physics2 example: fix the client side cam config to current version
physics2 server side (txml): use placeable scale instead of mesh scale for the lightsphere. to work with current WebTundra where mesh scale is not implemented in ThreeView. is good in general also as using placeable scale is the normal recommended way, mesh scale only for rare exceptional needs.
physics2: a correctly sized sphere.json for real now
Merge pull request #9 from playsign/physics2fixes

Physics2fixes