Start an event handler for stats events.
Start an event handler for stats events.

Change-Id: I69fc2c39ddae5baba360a5dc8ef82502d0870f97
Reviewed-on: http://review.northscale.com/1036
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

t3rm1n4l/ns_server,t3rm1n4l/ns_server,ingenthr/ns_server,vzasade/ns_server,daverigby/ns_server,mschoch/ns_server,daverigby/ns_server,membase/ns_server,nimishzynga/ns_server,ingenthr/ns_server,ceejatec/ns_server,ingenthr/ns_server,membase/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,ceejatec/ns_server,ceejatec/ns_server,daverigby/ns_server,mschoch/ns_server,nimishzynga/ns_server,membase/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,pavel-blagodov/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server,membase/ns_server,mschoch/ns_server,daverigby/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,nimishzynga/ns_server,mschoch/ns_server,vzasade/ns_server,ingenthr/ns_server,nimishzynga/ns_server,mschoch/ns_server,vzasade/ns_server,mschoch/ns_server,ceejatec/ns_server,ceejatec/ns_server