Add extracted place name to event?

[ahalterman]

Mordecai returns both the raw place name extracted from the text, as well as the gazetteer entry it matches that place name to. Right now, the pipeline only has a spot for the matched term, not the search term. But because there are lots of errors in the matching process, returning both could be a good way of communicating uncertainty in geocoding to end users.

Main downside: this would change the format of the resulting event data.