Move most of README information inside docs (!669) · Merge requests · GitLab.org / charts / GitLab Chart · GitLab

Achilleas Pipinellis - OOO until November 25th (parental leave) requested to merge limit-readme-info into master Feb 11, 2019

Closes https://gitlab.com/charts/gitlab/issues/1140 and https://gitlab.com/charts/gitlab/issues/1142.