ZA: Converted 2014 members interests data

Includes necessary manual slug corrections in the convert script for the
2014 data.
ZA: single format for members' interest release names and correct dates

Members' interests releases are currently named inconsistently and in a
sometimes confusing manner. This updates each year to a single format
and corrects release dates for years where the correct release date is
known.
ZA: re-convert 2010-2013 members' interests data for import

With changes to the database, members' interests data from 2010-2013
needs to be re-converted using convert_to_import_json.py in order to
allow successful import of the data. Includes corrections for
previously unmatched declarations.
ZA: corrections to 2011 members' interests data