Better support for repository depth

[w-racz]

Hosting Android development requires supporting a whole directory structure of many git repositories, so use of the repository depth option was something I was looking into.

I have noticed that if repository_depth is set in config.yml and there are two similarly named repositories within different paths of the directory structure, gitlist will only show one of them and ignore the other. A possible implementation to address it would be able to reflect the {path} to the repository in the URL to better support a directory tree as configurable within routes.yml.