Add disqus comments

Enable disqus comments by adding DISQUS_SITENAME to to pelicanconf.py.
style.css: Fix font stack (missing family declaration)

We were missing the family declaration, so if a visitor didn't have
Open Sans installed the computer would substitute it with an undefined
font.  If we at least specify the family then the result should be
a bit more predictable.
Merge pull request #6 from alanorth/font-stack

style.css: Fix font stack (missing family declaration)
Minor changes
Merge pull request #7 from kkingori/master

Add Disqus comments for posts.
templates/base.html: Add logic to include Google Analytics
Merge pull request #9 from alanorth/analytics

templates/base.html: Add logic to include Google Analytics
Use github-style code highlighting

From: https://github.com/aahan/pygments-github-style/blob/master/github.css
Merge pull request #10 from alanorth/pygments-style

Use github-style code highlighting
Replace Google Web Fonts with web-safe, cross-platform font stacks

This is good for a few reasons:
- Less reliance on Google
- Less crap to download during page load
- Uses better fonts on each platform

Font stacks from: http://css-tricks.com/snippets/css/font-stacks/

Signed-off-by: Alan Orth <alan.orth@gmail.com>
Fix syntax typo in style.css

Signed-off-by: Alan Orth <alan.orth@gmail.com>
Merge pull request #11 from alanorth/syntax-fix

Fix syntax typo in style.css
Merge pull request #12 from alanorth/font-stacks

Replace Google Web Fonts with web-safe, cross-platform font stacks