Add GitHost.io build script.
Merge branch 'githost-io-build-script' into 'master'

Githost io build script

See merge request !71
Remove duplicate rake task
Merge branch 'fix_githost_docs' into 'master'

Fix githost docs

Removing extra rake call that doesn't need to be there. Rake test handles gitlab shell install.

See merge request !9
After creating the database no migration is needed.
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ci

Conflicts:
	doc/examples/build_script_gitlab_ce.md
Update the url to the builds.
Use coveralls env

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