Merge branch 'gghs-0.3.0' into 'master'

Use gitlab-git-http-server 0.3.0 for GitLab 8.1

See merge request !1605

GITLAB_GIT_HTTP_SERVER_VERSION

-0.2.14
+0.3.0

doc/install/installation.md

@@ -325,7 +325,7 @@ GitLab Shell is an SSH access and repository management software developed speci
     cd /home/git
     sudo -u git -H git clone https://gitlab.com/gitlab-org/gitlab-git-http-server.git
     cd gitlab-git-http-server
-    sudo -u git -H git checkout 0.2.14
+    sudo -u git -H git checkout 0.3.0
     sudo -u git -H make
 ### Initialize Database and Activate Advanced Features