Update README with initial details

Author: timClicks

README.md

@@ -1,2 +1,18 @@
-# code
-Source code for the book Rust in Action
+# Welcome to _Rust in Action_ source code
+
+This source code repository is a companion to the [Rust in Action][] book available from Manning Publications.
+
+
+# Providing feedback
+
+The issue tracker is open, but please use livebook.manning.com/books/rust-in-action to submit issues.
+
+
+# Contact the author
+
+You are very welcome to contact me at any stage!
+The best channel is [Twitter](https://twitter.com/timClicks) and my email address is available on [my website](https://tim.mcnamara.nz).
+I'm also active on [Reddit](https://www.reddit.com/user/timClicks), [LinkedIn](https://www.linkedin.com/in/timmcnamaranz/) and the [Rust user forum](https://users.rust-lang.org/u/timclicks) and the discord servers for Rust. 
+
+
+[Rust in Action]: https://www.manning.com/books/rust-in-action?a_aid=rust&a_bid=0367c58f&chan=source_code