- add feature to list runners
- add feature to show runners details
- add feature to delete runner
- add feature to update runner

* master: (51 commits)
  Fix version
  Fix specs and rubocop warnings
  Improve the consistency of commit titles, branch names, tag names, issue/MR titles, on their respective project pages
  fixed LDAP activation on login to use new ldap_blocked state
  Fix Admin/Users view to position buttons without spacing magic
  Update to Go 1.5.3
  Fix the undefinded variable error in Project's safe_import_url method
  Update CHANGELOG [ci skip]
  Add some cosmetic changes to variables API documentation [ci skip]
  Fix misaligned edit button in milestone collection partial
  Update button styles for Milestones#show
  Modify builds API documentation style [ci skip]
  Modify :ci_variable factory
  Ensure the API doesn't return notes that the current user shouldn't see
  Add 'Build' prefix to Variables entry name in API docs index
  Fix some typos
  Add spec for Note#cross_reference_not_visible_for?
  Remove (invalid) timestamp formatting
  Move `BroadcastMessage#status` to a helper since it's presentational
  Update CHANGELOG
  ...

Conflicts:
	doc/api/README.md
	lib/api/api.rb
	lib/api/entities.rb

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Rails Autoload find file to require is use , APIHelpers -> api_helpers.rb, not helpers.rb;