Create documentation and include it in the distributed installation

[benjaoming]

We should have sphinx and create a static HTML documentation that's bundled and has a desktop shortcut on all user's desktops.

Documentation chapters:

• Introduction
• ICT centre customization: Local configurations
• How to:
  • Create new users
  • Change passwords
  • Install printers
  • Share an internet connection
  • Add content to the Intranet
  • Update the server
  • Change the content hard drive
• Online community (github etc)

[benjaoming]

@pdouglass made this initial structure for writing Sphinx documentation in reStructuredText... could you have a look? :)

It will automatically build when we push changes to github and it can be viewed online here:

http://fair-ubuntu-centre.readthedocs.org/en/latest/