Add constituency office data for ACDP, APC, AZAPO, MF, UCDP, UDM

This data was supplied by Rashaad Alli from PMG, who was given the
data by the parties.  Thanks to Geoff Kilpin for clarifying what some
of the unlabelled phone numbers were.
Update the constituency data import script with new parties
Switch quoting style to that of Libreoffice

Libreoffice's spreadsheet adds some (strictly speaking unnecessary)
quotes around cells containg, for example, parentheses - I need to
edit this file frequently in Libreoffice, so it makes sense to
convert to that form for cleaner diffs.
Add manually geocoded lon/lat for some addresses that aren't found
If a manually specified location exists for an Office, use that

The manually geocoded positions for DA constituency areas are still
set with the south_africa_set_da_office_locations command, but I've
created an issue to fix that:

  https://github.com/mysociety/pombola/issues/1326
Merge branch 'constituency-offices-update'