When set, git-get won't create a directory for the repo host.
So instead of `<root>/<host>/<user>/<repo>`, a repo will be cloned into `<root>/<user>/<repo>`.
It's useful if all repos some from the same host and that additional folder feels redundant.
- Simplify the main functions by moving actual implementation to "pkg" package
- Remove the "path" package and move files into the root "pkg" package
- Replace viper with explicit Cfg structs
- Isolate files into their own packages
- Create new printer package and interface
- Refactor Repo stuct to embed the go-git *Repository directly
- Simplify cmd package
