Rename Changes -> CHANGELOG.md
Add CONTRIBUTING.md
Make :spec default rake task
Merge pull request #3 from justfalter/minor-project-cleanup

Minor project cleanup
Make sure gemspec includes CONTRIBUTING/CHANGELOG
Bump to 2.1.0
Merge pull request #4 from justfalter/release-2.1.0

Release 2.1.0
Add more proxy methods
Save secure and bogus in Resolv::DNS::Message
Add missing nxdomain field

and throw exception on nxdomain==1