Experimental WebGL loading screen

I tried a quick prototype of a possible ‘loading’ screen for WebGL applications, which would be necessary once more of the engine is ported. (see [url]Panda3D WebGL Port!])

You can try it here (currently it loads the ‘pview-panda’ example compiled by rdb): https://cn04.github.io/emscripten-webgl-loader

I applaud your efforts. It’s a big improvement over the default emscripten one. Debug infos and additional download information/estimations would be a great addition.

Also did a draft based on yours, I inserted a random logo tho:

http://fs1.directupload.net/images/150830/ixy3eref.png

Ah, excellent work!