[1130] various db upgrades
[#1149] Move minimum requirements into requirements.in and generate a
requirements.txt file from it using pip freeze
[#1149] Upgrade to latest nosetests
[#1149] Fix some pep8 issues and problems with pip requirements on travis
Merge remote-tracking branch 'okfn/master' into 1149-pip-requirements
[#1149] Regenerate requirements file with older version of Babel and jinja2 that do not cause errors
[#1149] Pin requirements in minimum requirements file as discussed
[#1149] Typo
[#1159] Remove the 'id' from extra_vars
Merge branch '1130-various-db-upgrades'
Merge branch '1159-recently-changed-packages-helper'
Merge branch '1149-pip-requirements'