Updated Ruby version in deploy.rb to 2.0.0-p451.
Added Ruby 2.0.0-p451 to build matrix.

This will run tests on Ruby 2.0.0-p451 in addition to the other versions.
Merge pull request #165 from tmcyf/update-ruby-version

[RDY] Updated Ruby version in deploy.rb to 2.0.0-p451