Rebase repo check MR

app/controllers/admin/projects_controller.rb

app/mailers/repo_check_mailer.rb

app/views/admin/logs/show.html.haml

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

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

app/views/repo_check_mailer/notify.html.haml

app/views/repo_check_mailer/notify.text.haml

app/workers/admin_email_worker.rb

app/workers/repo_check_worker.rb

app/workers/single_repo_check_worker.rb

config/gitlab.yml.example

config/initializers/1_settings.rb

config/routes.rb

db/migrate/20160315135439_project_add_repo_check.rb

db/schema.rb

doc/administration/repo_checks.md

lib/gitlab/repo_check_logger.rb

spec/features/admin/admin_projects_spec.rb

spec/mailers/repo_check_mailer_spec.rb

spec/workers/repo_check_worker_spec.rb