Reword first paragraph and add tagline

Author: casey

README.md

@@ -5,10 +5,13 @@ Rust-Lightning
 [![Documentation](https://img.shields.io/static/v1?logo=read-the-docs&label=docs.rs&message=lightning&color=informational)](https://docs.rs/lightning/)
 [![Safety Dance](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
 
-Rust-lightning is a low-level Bitcoin Lightning library written in Rust. It is
-low-level in that it does not handle networking, persistence, or any other I/O.
-Thus, it is runtime-agnostic, but users must implement basic networking logic,
-chain interactions, and disk storage.
+Rust-lightning is a Bitcoin Lightning library written in Rust. The main crate,
+`lightning`, does not handle networking, persistence, or any other I/O. Thus,
+it is runtime-agnostic, but users must implement basic networking logic, chain
+interactions, and disk storage.
+
+The `lightning-net-tokio` crate is a full Lightning using the
+[Tokio](https://github.com/tokio-rs/tokio) async runtime.
 
 Status
 ------
@@ -46,6 +49,12 @@ non-optional/non-test/non-library dependencies. Really really do not add
 dependencies with dependencies. Do convince Andrew to cut down dependency usage
 in rust-bitcoin.
 
+
+Tagline
+-------
+
+*"Rust-Lightning, not Rusty's Lightning!"*
+
 Contributing
 ------------