Repository aliasing

[alecmev]

Repository names can often collide and require some "namespacing", e.g. Foo/plugins and Bar/plugins (which I would locally name foo-plugins and bar-plugins). They can also sometimes be unreasonably long like LongRepositoryNameGeneratorFactoryFactory, which I'd name long-repo-name-generator or something.

Would you be interested in a PR that adds aliasing? It would probably be a simple key-value table, with org/repo as the key, and path/to/repo as the value (resulting in /home/changeMe/path/to/repo, or, if an absolute path, /path/to/repo).