Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce

CHANGELOG

app/assets/images/ci/arch.jpg

app/assets/images/ci/favicon.ico

app/assets/images/ci/loader.gif

app/assets/images/ci/no_avatar.png

app/assets/images/ci/rails.png

app/assets/images/ci/service_sample.png

app/assets/stylesheets/framework/zen.scss

app/assets/stylesheets/pages/projects.scss

app/controllers/projects/imports_controller.rb

app/models/project.rb

app/models/project_services/slack_service/issue_message.rb

app/services/projects/create_service.rb

app/views/groups/_activities.html.haml

app/views/groups/issues.atom.builder

app/views/projects/_md_preview.html.haml

app/views/projects/_zen.html.haml

config/initializers/metrics.rb

doc/api/README.md

doc/ci/quick_start/README.md