Better blog index: First draft
Put the new blog index style on the front page too
More categories
Install the generate_categories plugin from @recurser

https://github.com/recurser/jekyll-plugins/blob/master/generate_categories.rb
I care more about consistent generated markup than saving four characters one
time in one tiny little bit of plugin code
A bunch of tweaks to categories and XML feeds
Fix active nav link in category index pages
Fix responsive blog index
Merge branch 'blogindex'