Squashed commit of the following:

commit b22ba03a76cb7a5f666d97c68b621dbb0db5701a
Author: Catherine Farman <cfarman@gmail.com>
Date:   Tue Feb 18 13:29:41 2014 -0800

    Update dynamically mapped files link

    documentation has moved from Github to gruntjs.com for this link.

Closes gh-156.
Fix docs 404