Merge branch 'release/3.0.0'

Merge branch 'feature/documentation-and-demo' into develop

Make base_path available to all includes that need it

Refine masthead

Build navigation list include helper
- Update navigation.yml to support multiple navigations and levels
- Optional include navigation into left sidebar

Merge branch 'feature/visual-refresh' into develop

Continue to refine styles and layouts

Merge branch 'feature/refactor-includes-layouts' into develop

Merge branch 'feature/refactor-layouts' into develop

Merge pull request #182 from YNedderhoff/experimental

Remove navigation role as it is unnecessary

Remove navigation role as it is unnecessary

Fix home linke path

Use data file to maintain site navigation
- Remove top navigation links from _config.yml

Improve responsive nav experience

Merge branch 'hotfix/schema'

Remove schema reference

Merge branch 'release/1.2.0'

Merge branch 'hotfix/updates' into develop

Add configurable external links to top navigation. Resolves #5

Merge branch 'develop' into gh-pages