Implement logging in main() from query param

[ianklatzco]

https://github.com/expenses/mateversum/blob/master/src/lib.rs#L51

Problem: web worker main thread - different global object - not window.foo, but rather worker.foo

To solve: should just be as easy as passing the query param into console_log::init_with_level ?

From https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/location

console.log(location); inside a worker should return an object->href shaped like http://localhost:8000/worker.js, which might not contain the query params passed by the user.

[ianklatzco]

Could pass the query params from orig url when we start the workers. But might be easier to just postMessage the relevant data directly to the workers on worker init.