Add 'run tests' development docs from GDK (!5684) · Merge requests · GitLab.org / GitLab FOSS · GitLab

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Jacob Vosmaer (GitLab) requested to merge jacobvosmaer-gitlab/gitlab-ce:development-docs-from-gdk into master Aug 05, 2016

This adds some documentation that lived in https://gitlab.com/gitlab-org/gitlab-development-kit but which belongs more in here.