Merge branch 'master' into project-header-titles

CHANGELOG

app/controllers/ci/helps_controller.rb

app/controllers/projects/blob_controller.rb

app/helpers/application_helper.rb

app/helpers/ci/application_helper.rb

app/models/concerns/issuable.rb

app/views/ci/helps/oauth2.html.haml

app/views/ci/helps/show.html.haml

app/views/layouts/ci/_nav_admin.html.haml

app/views/layouts/ci/_nav_dashboard.html.haml

app/views/layouts/ci/application.html.haml

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

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

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

app/views/projects/blob/_upload.html.haml

app/views/projects/blob/new.html.haml

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

config/routes.rb

db/schema.rb

doc/migrate_ci_to_ce/README.md