Adding a few descriptive items to the config file. These will eventually be
used by the RSS feed and perhaps other things.
Adding an atom feed to my blog.
[feed/feed.xml]
This is an xml atom feed file that will be populated by the jekyll build
process with all of my posts.
[_layouts/default.xml]
Referencing the atom feed in my default template so that all the pages can
be recognized by feed readers.