Merge branch 'feature/config-refactor' into develop

Reorganize settings and include default values for easier updating

Clean-up `Gemfile`
- Remove gems already included with `github-pages`
- Remove Octopress, should be optional

Feature: Config refactor

Merge pull request #182 from YNedderhoff/experimental

Remove navigation role as it is unnecessary

Support Jekyll 3.0
- Update to Jekyll v3.0
- Switch from Pygments.rb to Rouge for syntax highlighting
- Minor updates to syntax.scss partial and theme documentation
- Include jekyll-gist gem
- Close #192, #218

Merge pull request #216 from localstatic/setup-doc-fix

Fix typo in `bundle exec` command

Fix typo in `bundle exec` command

Increase width of main content container

Update links
- Remove Made Mistakes from header nav
- Update MM footer link

Update dependencies

Update Octopress config
- Remove _octopress.yml and move settings into _config.yml as per Octopress' documentation
- Close #163

Add basic print styles
- Hide menu, social share buttons, and ads on print
- Close #191

Revert "Update README.md"

This reverts commit 6bbbe819c83047afa1d59e733bb319f8a0965644.

Update README.md

Update Font Awesome to 4.5.0

Merge pull request #199 from kamilszymanski/markup-fix

Fix home markup for link posts

Fix home markup for link posts

Update gems

Add note and link to MM-Jekyll 3 branch.