add post-create hook so redis will be installed at VM creation time

packages/123done/.awsbox.json

@@ -1,5 +1,8 @@
 {
   "processes": [
     "server.js"
-  ]
+  ],
+  "hooks": {
+    "postcreate": "./scripts/post_create.sh"
+  }
 }

packages/123done/scripts/post_create.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+wget http://redis.googlecode.com/files/redis-2.4.14.tar.gz
+tar xvzf redis-2.4.14.tar.gz 
+cd redis-2.4.14
+sudo make install
+cd utils
+sudo ln -s /usr/local/bin/redis-server /usr/bin/redis-server
+sudo ./install_server.sh
+