Add ruby-2.0.0 to travis CI

.travis.yml

@@ -3,6 +3,7 @@ rvm:
   - 1.9.3
   - jruby-19mode
   - rbx-19mode
+  - 2.0.0
 
 before_script: "sudo ntpdate -ub ntp.ubuntu.com pool.ntp.org; true"
 script: "bundle exec rake clean test cucumber"
@@ -16,3 +17,4 @@ matrix:
   allow_failures:
     - rvm: jruby-19mode
     - rvm: rbx-19mode
+    - rvm: 2.0.0