Not directly about installation process - but about integration with external tools. Looks like you're focused on the SaaS tools, rather than selfhosted ones. Integration with application like Kandan [1], rather than locking with HipChat would be awesome too. And/or Jabber integration also could help a lot. Thank you for the awesome work you're doing by developing GitLab!
Most integrations are contributed by the community. I must admit that KanDan is very interesting and it is good to see it is still alive. It would be awesome if someone could contribute an integration for it.
http://feedback.gitlab.com/forums/176466-general/suggestions... is marked accepting merge requests, we would love to see this too