Add ability to gather application specific metrics ("count" and "mean")
This Metric Consumer exposes all (well behaved) metrics inside storm via a servlet that produces JSON. The default port is 7070, and the path is "/metrics" (e.g. http://localhost:7070/metrics) When deployed on a cluster, the servlet will pop up on the host that has the system metric bolt assigned (which can be tracked down in the Storm UI).
Register the debug metric consumer in CrawlTopology
Merge pull request #2 from DigitalPebble/metrics

Adding Enno's metrics to codebase