Update photo on "about" page
Resolve build warning in atom.xml

Resolves this warning:

  Build Warning: Layout 'nil' requested in blog/atom.xml does not exist.
Resolve deprecation warning related to pygments

Resolves this warning:

  Deprecation: The 'pygments' configuration option has been renamed to
  'highlighter'. Please update your config file accordingly. The allowed
  values are 'rouge', 'pygments' or null.
Fix 404
Use jekyll-redirect-from for redirects

Use redirect to handle bad incoming link from
http://blog.jayfields.com/2007/11/ruby-testing-private-methods.html
Use recommended setup for custom 404 page on GitHub Pages

See https://help.github.com/articles/custom-404-pages/
Add Gemfile and use the github-pages gem
Remove .htaccess

This file is mostly obsoleted by the changes in ea056fd and 48bb45d.