Setup Articles RSS feed

Add RSS feed XML template to `articles` category.
  - list latest Articles posts in RSS format

Reference RSS feed in default template header

Include `liquidify` template filter
  - filter liquid tag string through liquid
  - allow liquid variables in YAML frontmatter

Add XML files to watch list in Gulpfile
Include widgets in page footer layout

Basic site search form
  - make simple GET request to Google Site Search

RSS subscription links
  - Articles feed

About me introduciton information and avatar/photo

Contact links
  - Github
  - Twitter
  - Instagram
  - Email
Include site logo in page header

Presentation only links
  - negative tab index
  - svgs have role="presentation"
  - include both standard and 'focus' states
Include dynamic site navigation

Links defined in _config.yml

Detect if link should be "active"
  - compare current page URL to link URL
  - sub-pages cause a parent page link to be "active"
Install Bower dependencies