Revert "Pass self.qn.qnname to reverse lookups instead of the qn object"

This reverts commit f45d8b18c209023e6153227983229988fc5dcc5d.
Revert "Renaming centre_id attributes"

This reverts commit d678b737896bec58a8ad133cb9257cb021908996.
Revert "Got Parties tab working (#31)"

This reverts commit fe7dd04d8c12fc7fd998e276b710a120d9484710.