Update commands list and remove unecessary code

Add use strict

Add changelog entry

lib/commands.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// This file was generated by ./generate_commands.js on Wed Apr 23 2014 14:51:21 GMT-0700 (PDT)
+// This file was generated by ./generate_commands.js on Thu Sep 03 2015 02:40:54 GMT+0200 (CEST)
 module.exports = [
     "append",
     "auth",
@@ -17,6 +17,28 @@ module.exports = [
     "client getname",
     "client pause",
     "client setname",
+    "cluster addslots",
+    "cluster count-failure-reports",
+    "cluster countkeysinslot",
+    "cluster delslots",
+    "cluster failover",
+    "cluster forget",
+    "cluster getkeysinslot",
+    "cluster info",
+    "cluster keyslot",
+    "cluster meet",
+    "cluster nodes",
+    "cluster replicate",
+    "cluster reset",
+    "cluster saveconfig",
+    "cluster set-config-epoch",
+    "cluster setslot",
+    "cluster slaves",
+    "cluster slots",
+    "command",
+    "command count",
+    "command getkeys",
+    "command info",
     "config get",
     "config rewrite",
     "config set",
@@ -38,6 +60,12 @@ module.exports = [
     "expireat",
     "flushall",
     "flushdb",
+    "geoadd",
+    "geohash",
+    "geopos",
+    "geodist",
+    "georadius",
+    "georadiusbymember",
     "get",
     "getbit",
     "getrange",
@@ -54,6 +82,7 @@ module.exports = [
     "hmset",
     "hset",
     "hsetnx",
+    "hstrlen",
     "hvals",
     "incr",
     "incrby",
@@ -97,6 +126,7 @@ module.exports = [
     "rename",
     "renamenx",
     "restore",
+    "role",
     "rpop",
     "rpoplpush",
     "rpush",
@@ -138,6 +168,7 @@ module.exports = [
     "type",
     "unsubscribe",
     "unwatch",
+    "wait",
     "watch",
     "zadd",
     "zcard",
@@ -147,6 +178,7 @@ module.exports = [
     "zlexcount",
     "zrange",
     "zrangebylex",
+    "zrevrangebylex",
     "zrangebyscore",
     "zrank",
     "zrem",