Update readme about lower case commands

Author: Ruben Bridgewater

README.md

@@ -551,9 +551,9 @@ the second word as first parameter:
 
 ## client.send_command(command_name, args, callback)
 
-Used internally to send commands to Redis. For convenience, nearly all commands that are published on the Redis
-Wiki have been added to the `client` object. However, if I missed any, or if new commands are introduced before
-this library is updated, you can use `send_command()` to send arbitrary commands to Redis.
+Used internally to send commands to Redis. Nearly all Redis commands have been added to the `client` object.
+However, if new commands are introduced before this library is updated, you can use `send_command()` to send arbitrary commands to Redis.
+The command has to be lower case.
 
 All commands are sent as multi-bulk commands. `args` can either be an Array of arguments, or omitted.
 

index.js

@@ -692,7 +692,7 @@ function Command(command, args, sub_command, buffer_args, callback) {
 }
 
 RedisClient.prototype.send_command = function (command, args, callback) {
-    var arg, command_obj, i, il, elem_count, buffer_args, stream = this.stream, command_str = "", buffered_writes = 0, last_arg_type, lcaseCommand;
+    var arg, command_obj, i, il, elem_count, buffer_args, stream = this.stream, command_str = "", buffered_writes = 0, last_arg_type;
 
     if (typeof command !== "string") {
         throw new Error("First argument to send_command must be the command name string, not " + typeof command);