Add blog article template for generating new blog articles with
middleman
Revamp blog backend

  + Author image and name (at bottom of blog post page) are now set
    using values from frontmatter variables. The code for this block has
    been moved from each blog post to blogpost_layout.html.erb
  + Add a blog article template to use when generating blog articles
    with `middleman article`
  + Update older blogposts to use the new blog layout structure and
    frontmatter variables
Oops, looks like frontmatter has to be at the "front," duh I guess.

  + move blog article template first comment block below frontmatter
    block to avoid breaking the blog post.
Merge branch 'blog_tests' into develop
Fix busted blog posts

  + Adjust 8/18 blog post author block for new settings
  + fix broken image in 10/11/2013 blog post
Merge branch 'blog_cleanup' into develop