v5.0.1-1

• added GITLAB_CI_NOTIFY_ADD_COMMITTER configuration option
• added GITLAB_CI_NOTIFY_ON_BROKEN_BUILDS configuration option.
• added GITLAB_CI_RELATIVE_URL_ROOT configuration option.
• update to sameersbn/ubuntu:14.04.20140628 image
• added new SMTP_ENABLED configuration option.
• added NGINX_MAX_UPLOAD_SIZE configuration option.
• set SMTP_AUTHENTICATION to 'login' by default.
• shallow clone gitlab-ci
• automatically migrate the database when the gitlab-ci version changes
• enabled spdy support
• upgrade to nginx-1.6.x series from the nginx/stable ppa
• removed sshd start, use nsenter instead