Merge pull request #4 from zznate/jmxify-registry

moved up some constants. Adds initial JMX plumbing. Still needs some cle...
Merge pull request #5 from zznate/jmxify-registry

using sharedmap to communicate handlers
Merge pull request #6 from zznate/separate-get-handler

broke out get operation into it's own handler to facilitate testing supp...
Merge branch 'master' into separate-get-handler
added sweep handler, moved expiry logic into utils class