Also include "Deregistered" and "Lapsed (Third Party)" parties

For the candidate database we'd also like to include candidates from the
2010 election, and lots of those were in parties that are no longer
registered. This commit reintroduces them to the CSV file - they're easy
to filter out based on the "Registration status" column anyway.
Merge pull request #1 from mhl/gh-pages

Also include "Deregistered" and "Lapsed (Third Party)" parties