Category filters from fedmsg.meta
Merge branch 'develop' of https://github.com/fedora-infra/datanommer into develop

Conflicts:
	datanommer.models/alembic/versions/a4f74590bcf_determine_category.py
	datanommer.models/datanommer/models/__init__.py
Merge branch 'develop' of https://github.com/fedora-infra/datanommer into develop
Merge branch 'develop' of https://github.com/fedora-infra/datanommer into develop
Merge branch 'release/0.4.2' into develop
Merge branch 'develop' of https://github.com/fedora-infra/datanommer into develop
Dump --since and --before
Merge pull request #32 from HousewifeHacker/dump-dates

Dump dates
Add back alembic scripts that got lost somehow.
Added help documentation
Merge pull request #33 from HousewifeHacker/help-text

Added help documentation
Tests --before and --since for DumpCommand
Support old nose.
Merge branch 'test-dump-timeframe' into develop
Pretty dump of latest --timesince
Tests dump --since seperate from --before and latest args timestamp,
timesince, and human of each
Merge pull request #35 from HousewifeHacker/tests-with-timestamps

Tests with timestamps
Category column not nullable. In order to create a new alembic script,
the previous script had to be changed. The models give category
'Unclassified' if the category cannot be determined from the topic and
categories from fedmsg. The alembic script alters the nullable property
of the category column.
Merge pull request #36 from HousewifeHacker/category-not-nullable

Category column not nullable
Add backrefs on user/package relationships.