[bug 1000949] Remove related articles and questions and MLT infra.
[Bug 991099] Update EU to 0.9.1.

Add elasticsearch-py 0.4.5
[Bug 991099] Add urllib3.

This is needed for elasticsearch-py
[bug 991099] Remove pyelasticsearch.

We don't need this anymore.
[Bug 991099] Fix all the things for EU 0.9.1.