More mods to make it compatible with ruby 1.8.7


Hi Tim,

Sorry, I was in a meeting. Not sure if you are still there. I just git fetched the latest code, and made more mods to the hash rockets :). Yu may pull from this one.
Another thing is, i am not sure the background reason to print jmx to stdout. Do we really need it? Because I found it a little bit annoy in CI.

Looking forward to see the amazing tool running all all of our CIs. 

Cheers,
Mark