Throw a 404 instead of a server error if an election list is missing.
Throw a 404 instead of a server error if an election list is missing.

geoffkilpin/pombola,mysociety/pombola,hzj123/56th,hzj123/56th,mysociety/pombola,ken-muturi/pombola,hzj123/56th,patricmutwiri/pombola,hzj123/56th,ken-muturi/pombola,ken-muturi/pombola,patricmutwiri/pombola,patricmutwiri/pombola,patricmutwiri/pombola,geoffkilpin/pombola,patricmutwiri/pombola,geoffkilpin/pombola,mysociety/pombola,patricmutwiri/pombola,mysociety/pombola,mysociety/pombola,hzj123/56th,hzj123/56th,geoffkilpin/pombola,ken-muturi/pombola,ken-muturi/pombola,geoffkilpin/pombola,mysociety/pombola,ken-muturi/pombola,geoffkilpin/pombola