Web worker

[sverhoeven]

Fixes #6

TODO

• [x] working plumbing
  • accomplished by turning of server side rendering (ssr)
• [x] single method
• [x] bmi-like class,
  • update loop on ui side
  • initialize(config object)
  • get_output_var_names return [h, theta,dtheta,q,sq,t]
  • get_value returns array with single value
• [x] method bmi.run(outputconf) with output conf (like output frequency, var names), update loop in web worker

[sverhoeven]

This is exactly what I was hoping for: exposing a BMI model that runs in a web worker :-)

A minor issue I noticed: if I increase the number of timesteps to a ridiculous amount, such that the run actually takes perceivably long, the form is still showing. I would expect the form to close immediately and not wait till the run is finished. Then, ideally, I'd like to see experiment card reflect the status of the run.

We can fix that later. with #12