Add README file

Signed-off-by: Gris Ge <fge@redhat.com>

Author: cathay4t

Cargo.toml

@@ -3,11 +3,10 @@ name = "rtnetlink"
 version = "0.11.0"
 authors = ["Corentin Henry <corentinhenry@gmail.com>"]
 edition = "2018"
-
 homepage = "https://github.com/rust-netlink/rtnetlink"
 keywords = ["netlink", "ip", "linux"]
 license = "MIT"
-readme = "../README.md"
+readme = "README.md"
 repository = "https://github.com/rust-netlink/rtnetlink"
 description = "manipulate linux networking resources via netlink"
 

README.md

@@ -0,0 +1,9 @@
+# Rust crate for rtnetlink protocol
+
+This crate provides methods to manipulate networking resources (links,
+addresses, arp tables, route tables) via the [netlink route protocol][1].
+
+Rust crate document could be found at [docs.rs][2].
+
+[1]: https://www.man7.org/linux/man-pages/man7/rtnetlink.7.html
+[2]: https://docs.rs/rtnetlink