Added CKEditor plugin for code editor

A bunch of code has been added to the config.js.

To enable more language, add it in the HIGHLIGHT. The languages enabled
so far are only HTML, CSS, Javascript and PHP.
Attempt to make async requests

This attempt failed as I only found out now that GAE has a distributed
filesystem and disables any writes to files.

Now I will be moving on to using the Google Datastore.