Re: [PATCH v4] Move rust gitcore crate to a different subdirectory

> Having `Cargo.toml` at the top-level of the repository implies that one
> can run `cargo build` directly, but this doesn't produce anything useful
> on its own.
>
> Additionally, when including the git source as a submodule of a Rust
> project, it prevents the git source from being included at all in the
> crate package because cargo skips directories that contain a Cargo.toml,
> assuming that everything in the directory is relevant to the crate.
>
> Move all Rust-specific files into a dedicated `rust/` subdirectory.
>
> Signed-off-by: Mike Hommey <mh@glandium.org>
> ---