Template formatting changes

Go back to standard font size and container width to increase
information density.  Increase margin slightly and just use default
font color
Add simple atom feed for latest month

Add a simple atom feed for the latest month.  Some minor refactoring
to support this better.

Change the config file from a required argument to a required
positional, and add some better checking for the config file
Regenerate sample file

Regenerate sample file
Update documentation for atom feed

Update documentation
Bump to 0.4

Bump to 0.4