Merge branch 'master' into 18533-graphs-wiki-subnav

CHANGELOG

Gemfile

Gemfile.lock

app/assets/javascripts/application.js.coffee

...avascripts/graphs/stat_graph_contributors_graph.js.coffee

app/assets/stylesheets/framework/blocks.scss

app/assets/stylesheets/framework/dropdowns.scss

app/assets/stylesheets/framework/sidebar.scss

app/assets/stylesheets/pages/labels.scss

app/assets/stylesheets/pages/stat_graph.scss

app/controllers/admin/appearances_controller.rb

app/helpers/gitlab_markdown_helper.rb

app/views/admin/appearances/_form.html.haml

app/views/admin/appearances/preview.html.haml

app/views/layouts/nav/_project.html.haml

app/views/projects/compare/index.html.haml

app/views/projects/compare/show.html.haml

app/views/projects/forks/index.html.haml

app/views/projects/show.html.haml

app/views/shared/projects/_list.html.haml