Update Pillow due to a security alert

This is due to CVE-2014-3589 (a denial of service attack).
KE: Add a comment to dump petition and senate comments data

This is needed both for analysis by MIT and to forward the comments on
to the senate.
Run popit_resolver_init in update_za_hansard.bash
Update za-hansard to latest version

This version includes the fix to carry on past the first seen report.
Add allowed bleach tags to base.py settings

This instructs bleach that it should keep the allowed tags and
attributes as they are, but strip anything else.
Always show the advanced search for South Africa

As requested by PMG, rather than using hide/reveal on the advanced
search we simply show it immediately.
Merge remote-tracking branch 'origin/1509-show-advanced-search'
Add notes on za hansard reparsing to south_africa.md

This includes the relevant commands that need to be run, along with some
background on what they do and what to watch out for when you run them.
Update za-hansard / popit-resolver to include some name resolution fixes
Don't show HTML in Hansard appearance excerpts

Thanks to Chris Mytton and Matthew Somerville for comments and
suggestions for this.
curl should get install-site.sh from githubusercontent.com, and should follow redirects
Merge remote-tracking branch 'origin/vagrantfile-curl-fix'
Vagrantfile: the dev-argument branch is now in master

It's better to just point to master now that it includes those changes
anyway.
ZA: correct settings file used by members interests import script
ZA: members interests 2014 data
ZA: Update members interests convert script to handle 2014 format names

The 2014 members interest data does not include MPs' middle names. This
searches for names that contain the first and last name if the existing
approach fails.
ZA: Converted 2014 members interests data

Includes necessary manual slug corrections in the convert script for the
2014 data.