Revert back to original API of full country names
Allow ISO 3166 alpha2 codes to be optionally used
Update Appraisals to actionpack 4.0.0
Update appraisal gemfiles
Fix specs for actionpack 4.0
Add appraisal to README
Fix actionpack development dependency for ruby < 1.9.3
Update README with instructions on how to load country name from iso code
Use 1.8 hash syntax to not be totally snooty
Allow failures on ruby-head due to a bug in ruby-head

  For more info see https://groups.google.com/forum/#!topic/travis-ci/9KNUV6bJmpE
Keep the rubies in order-ish
Merge pull request #24 from scudco/optional-iso

Make the use of ISO codes as values optional