adding more rubies to travis
adding more rubies to travis

1.9.3, 2.1.1, ruby-head, jruby-head, and rbx-2.2

dblock/hashie,dblock/hashie,michaelherold/hashie,michaelherold/hashie,marshall-lee/hashie,intridea/hashie,marshall-lee/hashie,intridea/hashie