PWA - test app: 4 tabs of animated algorithms

To fire up on local server:

> git clone https://github.com/UnacceptableBehaviour/js_canvas_IO_docs
> cd js_canvas_IO_docs/docs
> http-server -p 8000                   # fire up server navigate to landing page link

See js_lib_test_CORS_issue also: Animation how to use RAF - request animation frame

Standalone bouning balls animation - walk through
Again . .

> git clone https://github.com/UnacceptableBehaviour/js_canvas_IO_docs
> cd js_canvas/js_lib_test_CORS_issue
> http-server -p 8000                   # fire up server navigate to landing page link