adding before_sha to information

adding before_sha to information for better comparative analysis during CI tests (added to ENV too)
Update network.rb

added before_sha to return from get_build
fixed typo

fixed typo
Merge pull request #38 from endzyme/patch-1

adding before_sha to information
Suggest a better place for cloning runner
Install script is really only doing the setup.
Merge branch 'install-is-setup' of /home/git/repositories/gitlab/gitlab-ci-runner