Added script to output JSON of candidate address/grad semester info

[jasonkhoe]

There's probably a better way to do this, or a better format. Was originally going to do CSV, but Excel didn't import it correctly.

[seshness]

There are libraries that deal with the escaping and formatting issues that crop up with CSVs. We've used the CSV module in hkn_rails before, eg.
https://github.com/compserv/hkn-rails/blob/master/app/controllers/people_controller.rb#L199

Docs: http://ruby-doc.org/stdlib-1.9.2/libdoc/csv/rdoc/CSV.html