Add CompoundSignal (https://github.com/millermedeiros/CompoundSignal)
move app.html up from src directory
filename tweaks,
webTundraModel.js -> WebTundraModel.js
threeView.js -> ThreeView.js
untabify
Revert indentation to 4 spaces
rename ip -> host
Rearrange some utility funcstions, bring back light hack for Physics2 scene.
Mesh mode (useCubes=false) works again and Physics2 scene runs.
update View code from signals version
Signals mode now works with Physics2 scene