gitignore Gemfile.lock http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/
add contribution guidelines
add Jerry as a maintainer in gemspec
add CHANGELOG
bump gem version to 2.0.0
Merge pull request #80 from intridea/release-2.0.0

Release 2.0.0