Brings the blog into Jekyll

- Makes a good first stab at migrating the blog out of tumblr and into Jekyll like the rest of the site
- Single blog post page replicating the bare template (https://18f.gsa.gov/developer/)
- JS and CSS fixes to support the above
  - Ripped out tumblr API stuff
  - Modified CSS to account for blog posts already being there (not generated by JS)
Staff photos with YAML
Adds gboone to the team.yml and cleans out commented code

- JS code that was commented in order to remove is now gone,
Fixes the post template so that images don't spill off the right side and share links are within the container
removes commented css
Makes the logo link to the homepage instead of index.html
Merge pull request #150 from 18F/make-jekyll

Brings the blog, staff photos, other content into Jekyll