iChange `name` and `path` to `name_with_namespace` and `path_with_namespace` in `RunnerProjectDetails`

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

Update web editor documentation

Based on https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/1045

Closes #4262

See merge request !2776

Project limit is reached warning is hidden when the projects_limit is zero

Fixes #12791

See merge request !2890

Fixes #12791

Update Gemojione for new hotness ✨

Before | After
------ | -----
![Screen_Shot_2016-02-12_at_3.38.43_PM](/uploads/299e5ffe38c91657085741261a678f81/Screen_Shot_2016-02-12_at_3.38.43_PM.png) | ![Screen_Shot_2016-02-12_at_3.38.09_PM](/uploads/ccee29719a6445a9efd2498391a7eea0/Screen_Shot_2016-02-12_at_3.38.09_PM.png)

See merge request !2800