* Rename HQL files to better reflect content.

* Declare User-Agent. Try not using proxy.

* Fix parameter name.

* Fix text name.

* Address review comments from @otto.

* Delete old mismatch data only from current wiki_db run.

* Fix runtime bugs on proxy access. Improve the results table DDL.

* Attempt to fix module reference issue. Part two.

* Attempt to fix module reference issue.

* Add console script for emit_mismatch_rows.py.

* Add page_id to results table.

* Incorporate @milimetric's mismatch categorization improvements.

As per https://phabricator.wikimedia.org/T368176#9973938

* PySpark job to emit mismatch rows.