Phoenix 180

First revision for review.  There are some open points here.  Still no test case added to consume the stats.  Will do the performance test once the system is available with me.
The schemaName and tableName are derived from the HTable name which you can get from the RegionCoprocessorEnvironment. We have util methods in SchemaUtil that'll give you back the schemaName and tableName given the byte[] or String of a full HTable name. Is this still an issue?