Some pointers on creating the wrapper js over the emscripten build

[sdmuki]

Here is what's needed:

1. A library to JS array and pointer conversions. I wrote the vector one for 32 bit floats.
2. an API exposing readable functions which consumes the wasm js wrapper from emscripten build. Examples in the api folder.

[TtheBC01]

this can be accomplished through compiler flags too

[TtheBC01]

32bit floats is probably what we want to work in