WIP: Blog redesign.
Style single post pages.
Add a header and a footer.
Add docs, fix pagination back to first page.
Remove newsletter section from some posts.

Needs to be redesigned.
Add gravatar images to the blog posts.
Fine tuning for footer and pagination.
Add docs to top navigation.
Handle empty title, add new GA tracking identifier.
Fix header for multi-line blog titles.
Minor adjustments for older posts.
Use different gravatar id for myself.
Slimmed down the footer to the essentials.
Merge pull request #293 from travis-ci/mm-blog-redesign

Blog redesign
Slightly smaller margin for the inner footer.
Fix link to imprint.
Visually separate blog posts in the list with an hr.
Reduce top margin for article header in list.
Increase margin for first article.
Merge branch 'master' into rkh-nodejitsu