Updated the website configuration to personalize the blog.

 * Modified the footer to be more compact and to generate the copyright date from the current year.
 * Modified the "About" link to point back to amussey.com.
 * Allowed the description field on individual posts to be defined and to replace the post's meta description.
 * Changed the color of the "Back to Overview" button from green (#57ad68) to red (#A02332).  Another shade of red (#9B2332) was also considered.
 * Removed the "df" logo in favor of an "AM" logo.
 * Updated the README.md.