Refactor the shared docpad code into a new documentation repository

The docpad installation currently being used for Fluid Infusion Docs can be refactored into a new project of just shared components. This way it will be easier to create derivative sites (like the Inclusive Learning Design Handbook).

This new repository will include:

• docpad.js which contains shared helper functions
• document templates
• shared CSS, fonts, and other files
• Infusion's UIO

Once refactored, offspring sites will use node to retrieve the shared components from git.