Implement optional namespace for server

notes/consistent_and_namespaces

@@ -0,0 +1,9 @@
+a key goes to a consistent hash to determine a partition id. Look up the addr which holds that partition ID.
+end:1 key -> client
+client:1 key -> 1+ partitionID
+client:1 partitionID -> serverAddr
+client:partition,key,serverAddr -> server
+server:partition,key -> value
+1+ server:value -> client
+client:1+ value -> 1 end:value
+