SCRIPT command corrections

There is no command(s) like `script load`. Only has `script`

if we invoke `redisClient['script load']()` following error will be raised

~~~log
Error: ERR unknown command 'script load'
      at ReplyParser.RedisClient.init_parser (/Volumes/edu/projects/dejaset/tusker/node_modules/redis/index.js:260:27)
      at ReplyParser.EventEmitter.emit (events.js:96:17)
      at ReplyParser.send_error (/Volumes/edu/projects/dejaset/tusker/node_modules/redis/lib/parser/javascript.js:293:10)
      at ReplyParser.execute (/Volumes/edu/projects/dejaset/tusker/node_modules/redis/lib/parser/javascript.js:176:22)
      at RedisClient.on_data (/Volumes/edu/projects/dejaset/tusker/node_modules/redis/index.js:476:27)
      at Socket.<anonymous> (/Volumes/edu/projects/dejaset/tusker/node_modules/redis/index.js:79:14)
      at Socket.EventEmitter.emit (events.js:96:17)
      at TCP.onread (net.js:397:14)
~~~