* Move gitaly, git-lfs and 2FA logic out from gitlab_shell.rb
* Streamline parsing of origin_cmd in GitlabShell
* Utilise proper HTTP status codes sent from the API
* Also support 200 OK with status of true/false (ideally get rid of this)
* Use HTTP status constants
* Use attr_reader definitions (var over @var)
* Rspec deprecation fixes

* Use constants for git commands
* private instead of protected

* Remove HTTP related requires
* Make protocol = GL_PROTOCOL the default

* Rename actor to key_id
* protected to private
* Move attr_reader defintions under private

* Base - contains all common logic
* Gitaly - performs interactions with Gitaly
* API2FARecovery - 2FA recovery code generation
* GitLFSAuthenticate - git-lfs authentication

* Fix lib matcher so it actually runs specs
* Strip out only what we need/use

Update gitaly-proto to 0.109.0

See merge request gitlab-org/gitlab-shell!216

Add script to update vendored go libs

See merge request gitlab-org/gitlab-shell!212

Refactor for re-usability for future MR's

See merge request gitlab-org/gitlab-shell!210

This was not posing an issue during CI, but was an issue locally.

Run go tests in CI with Go 1.9 and 1.10

See merge request gitlab-org/gitlab-shell!208

Resolve "NoMethodError for nil in pre-receive hook"

Closes #138

See merge request gitlab-org/gitlab-shell!206

Update LICENSE year to 2018

[ci skip]

See merge request gitlab-org/gitlab-shell!205