Add Dave's netfile-etl stuff

Since this is pretty integral to the OpenDisclosure project, it makes
sense to keep in the same repo for now. Depending on how the scripts end
up being run, this might not make sense. But I think it is fine for now.
Fix typos in data-loading refactoring
Add new candidates

This adds Kaplan and Siegel, and updates Ruby to have the correct
campaign id. (see #128)
Add some test coverage for Summary fetcher

Since this is arguably the most important fetcher (fetching all the big
giant numbers), this deserves a bit of test coverage.
Merge pull request #130 from ted27/master

Add new candidates