Allow CLI parser to be run from a (Celery) queue

[tofumatt]

@andymckay, @mstriemer, and I talked about #49. What we actually need is to use the existing https://github.com/mozilla/olympia Django app as our API server (having multiple front ends is needless) to handle the Validator's API (eg: upload a file for validation -> get an ID -> query said ID for its validation status).

Do need to get the validator to run as a Celery task that can get data from the Django API (put into celery) and then send data back.

The API would return a status of the validation (processing/complete) with a series of messages/warnings/errors (as JSON, which the validator can already easily produce being a JS app).

[tofumatt]

Note that running the npm version will fail until we fix #185, but I'm looking to fix that soon 😄

[muffinresearch]

Ok #185 and #201 are fixed. The package looks to be functional when installed from npm now.

[EnTeQuAk]

Awesome, thanks a lot @muffinresearch!

[EnTeQuAk]

I think this already fixed now and QA is already testing the new linter on -dev.