Create doc/settings/environment-variables.md
Create doc/settings/gitlab.yml.md
Move link from README to gitlab.yml.md
Also don't edit applicaton.yml manually
Create doc/settings/redis.md
Warn that GitLab CI does not have a backup script
Create doc/settings/nginx.md
Move more documentation into doc/settings/nginx.md
Add custom database setup docs for gitlab-ci
Merge branch 'jacobvosmaer/omnibus-gitlab-more-ci-docs'
Explain how to disable GitLab and run CI only
Explain that GitLab would still be set up
Merge branch 'doc/ci-standalone' into 'master'

Explain how to disable GitLab and run CI only

See merge request !239
Added upgrade notice for ee packages to first upgrade to 7.3 is they are using RPM packages.
Merge branch 'master' of gitlab.com:gitlab-org/omnibus-gitlab
add fail_timeout=0, make formatting more consistent w/ gitlab files
Merge branch 'nginx-config-fixes' into 'master'

Update nginx config to match GitLab repo

* Add `fail_timeout=0;` as added in https://github.com/gitlabhq/gitlabhq/commit/25ee53c3aea763f794948947a6f4c4fd422bbf7b & recommended by
http://unicorn.bogomips.org/Unicorn/Configurator.html#method-i-timeout when Unicorn is running behind nginx.
* Better match formatting to https://gitlab.com/gitlab-org/gitlab-ce/blob/master/lib/support/nginx/gitlab-ssl & https://gitlab.com/gitlab-org/gitlab-ce/blob/master/lib/support/nginx/gitlab

Helps with #328 (why does https://gitlab.com/gitlab-org/omnibus-gitlab/issues/328 not just resolve to show #328?)

See merge request !242