Update message codes to support CS, counters and Yokozuna.

Reference: https://github.com/basho/riak-ruby-client/blob/master/lib/riak/client/beefcake/message_codes.rb

message_codes.go

@@ -1,33 +1,48 @@
 package riak
 
 const (
-	rpbErrorResp = iota
-	rpbPingReq
-	rpbPingResp
-	rpbGetClientIdReq
-	rpbGetClientIdResp
-	rpbSetClientIdReq
-	rpbSetClientIdResp
-	rpbGetServerInfoReq
-	rpbGetServerInfoResp
-	rpbGetReq
-	rpbGetResp
-	rpbPutReq
-	rpbPutResp
-	rpbDelReq
-	rpbDelResp
-	rpbListBucketsReq
-	rpbListBucketsResp
-	rpbListKeysReq
-	rpbListKeysResp
-	rpbGetBucketReq
-	rpbGetBucketResp
-	rpbSetBucketReq
-	rpbSetBucketResp
-	rpbMapRedReq
-	rpbMapRedResp
-	rpbIndexReq
-	rpbIndexResp
-	rpbSearchQueryReq
-	rbpSearchQueryResp
+	rpbErrorResp              = 0
+	rpbPingReq                = 1
+	rpbPingResp               = 2
+	rpbGetClientIdReq         = 3
+	rpbGetClientIdResp        = 4
+	rpbSetClientIdReq         = 5
+	rpbSetClientIdResp        = 6
+	rpbGetServerInfoReq       = 7
+	rpbGetServerInfoResp      = 8
+	rpbGetReq                 = 9
+	rpbGetResp                = 10
+	rpbPutReq                 = 11
+	rpbPutResp                = 12
+	rpbDelReq                 = 13
+	rpbDelResp                = 14
+	rpbListBucketsReq         = 15
+	rpbListBucketsResp        = 16
+	rpbListKeysReq            = 17
+	rpbListKeysResp           = 18
+	rpbGetBucketReq           = 19
+	rpbGetBucketResp          = 20
+	rpbSetBucketReq           = 21
+	rpbSetBucketResp          = 22
+	rpbMapRedReq              = 23
+	rpbMapRedResp             = 24
+	rpbIndexReq               = 25
+	rpbIndexResp              = 26
+	rpbSearchQueryReq         = 27
+	rbpSearchQueryResp        = 28
+	rpbResetBucketReq         = 29
+	rpbResetBucketResp        = 30
+	rpbCSBucketReq            = 40
+	rpbCSBucketResp           = 41
+	rpbCounterUpdateReq       = 50
+	rpbCounterUpdateResp      = 51
+	rpbCounterGetReq          = 52
+	rpbCounterGetResp         = 53
+	rpbYokozunaIndexGetReq    = 54
+	rpbYokozunaIndexGetResp   = 55
+	rpbYokozunaIndexPutReq    = 56
+	rpbYokozunaIndexDeleteReq = 57
+	rpbYokozunaSchemaGetReq   = 58
+	rpbYokozunaSchemaGetResp  = 59
+	rpbYokozunaSchemaPutReq   = 60
 )