Downloads stanford NER and extracts it to pypln home
Adds supervisord job to keep Stanford NER running

We're using the 7 classes classifier for now, but it's possible we'll combine
this with the 3 classes classifier later.
Adds scripts to run Stanford NER with the 3 classes classifier
Adapts deploy process to the new project structure
Removes scripts that run the 3 class Stanford NER classifier

This is no longer necessary because of https://github.com/flavioamieiro/pypln.backend/commit/56b4a40d690c5c58b372e6c939bc4fdf802842ba
Fixes static files url in nginx.conf
Removes duplicated code
Merge branch 'feature/stanford_ner' into develop
Update allowed hosts during deploy
Appends to allowed_hosts file instead of overwriting