implemented key_stats reporting
implemented key_stats reporting

couchbase/moxi,zbase/moxi,zbase/moxi,zbase/moxi,steveyen/moxi,membase/moxi,couchbase/moxi,steveyen/moxi,couchbase/moxi,membase/moxi,membase/moxi,couchbase/moxi,membase/moxi,zbase/moxi,steveyen/moxi,steveyen/moxi,zbase/moxi,couchbase/moxi,steveyen/moxi,membase/moxi,membase/moxi,couchbase/moxi