EC_Camera and EC_Light working.
physics2 Tundra example scene with three-json converted mesh+materials.

TODO:
- replace sphere.json with actual sphere, is now a placeholder.
- add a mechanism to get the storage baseurl if needed
renamed scenes -> examples, figured it is clearer even though is scenes/ in native tundra
html as an entry point for the physics scene, just to get the relative asset refs right. there is no system for it yet and the need is to be seen as typically web apps are made by making a html anyway (webtundra based pong is coming up as an example of that)
physics2: config camera now in client side logic. campos would come from the spwanpoint entity on server too but this was quicker to impl for now.
Merge branch 'examplescene'