Cleaned up address fields
Added Windows Ruby as a platform in the Gemfile
Updated documentation based on JRuby unit test issue
Removed JRuby known issue, because it's a Windows known issue.
Updated files dependent on the old address fields
Updated documentation to reflect single address per person
Updated export example
Merge pull request #281 from codeforamerica/simplify-address

"Here, There, and Everywhere" or Simplifying addresses