Fix the syntax for catching multiple exceptions
Fix the syntax for catching multiple exceptions

Previously, this would only catch ImportError exceptions, due
to the way the amiguity described here:

  http://legacy.python.org/dev/peps/pep-3110/#rationale

... is resolved.

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