[issue871] Fix Google Code Bug Importer

Continuation of #50. @paulproteus and I are pairing on a CR and we will merge this tonight.
This whole block is a bit mystifying. We iterate through labels, splitting them into tuples `(type, name)` which are local to the loop and disappear as soon as we go out of scope. I'm also not happy with calling one of these fields `type` as that's a python keyword, though I think that's valid code.

This might be better written as a regex match, i.e. `(.*?)-(.+)` Trying to assign a 1-tuple to a 2-tuple to get the ValueError to throw is a roundabout way to check this.