Add command to fix ZA PositionTitles

This adds a command which updates all Positions with the PositionTitle 'Party Member' to have 'Member' instead, then deletes the Party Member title. For #1153
Rename'Party Member' roles to 'Member'

For #1153. Party Member is superfluous, they're Member's of a party, so we can work it out.
Add live crontab for update_za_hansard.bash.

Temporarily allowing both staging and live sites to have a cron job for the hansard, we should turn off the staging site when we launch the live site. For #701
PEP8 Tidy-ups
Distinct places returned by Person.constituencies

As a temporary measure to fix #1200 without solving the underlying problem (see #1214) this commit adds a .distinct() onto the query that returns the places, and some tests to make sure it's working as expected. Closes #1200
Pin pygeocoder to version 1.2.2 from pypi.

Closes #1219

This also removes the pygeocoder repository from the virtualenv's src folder
Pin mysociety dependencies to specific commits

The changes here pin the mySociety dependencies we get from git repos to specific commits in those repos, to avoid breaking changes in the future biting us on deploys. Because we previously used the -e switch to install them as source packages, it's necessary to remove the folders pip put into our virtualenv first, otherwise it'll ignore our new requirements. For #701
Pin django-mechanize to a specific commit
Switch to mapit from pypi and pin it
Added disclaimer to footer

Styled message and refactored some exisiting footer styles
Closes #1180
Merge branch 'issues/1180-footer-copy-changes' of ssh://git.mysociety.org/data/git/public/pombola
Merge branch 'master' of ssh://git.mysociety.org/data/git/public/pombola
Update ZA Menu items

Closes #1166
Switch to Poplus mailing list

Replace link to (closing) Components list with link to Poplus list. Closes #1226
Pin all packages to exact versions
Merge branch 'issues/701-pin-git-based-requirements' of ssh://git.mysociety.org/data/git/public/pombola
ZA: Document update_za_hansard.bash and friends

Documents the scripts run by update_za_hansard.bash, which are
supplied by the za-hansard project
Merge branch 'issues/1166-menu-bars'
Tweak styling for intro on house pages.

Closes #1221. Along with the necessary data updates to the database
Merge branch 'master' of ssh://git.mysociety.org/data/git/public/pombola