Let try to run the gem on travis using ruby 2.0.0
Update readme to reflect the addition of the ruby 2.0.0 CI tests

We still need to run local test to make sure everything works fine.
Merge pull request #23 from Leetchi/ruby-2.0-integration-test

Since all the tests ran on the CI passed this will be merged. Hooray we are now running Ruby 2.0.0.