Support for other repo source (Gitlab, pull on hooks) #188

Any plans or chance for support of other source other than github? I personally use gitlab (both a community server that I maintain, as well as sometimes using gitlab.com) and it'd be great to be able to gather from those sources.

If auth integration dev is a concern, perhaps a more simple approach could be used by providing an https url for a repo, as well as a username and password to access it, or a deploy key.