Update readme

README.md

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 # `bitcoind` JSON-RPC support
 
-Much of the code in this crate was shamelessy stolen from [rust-bitcoincore-rpc
-v0.19.0](https://github.com/rust-bitcoin/rust-bitcoincore-rpc). As such I have maintained the
-original author's list and added my own name for accountability. All bugs are my own (tcharding).
+There are two primary purposes of this repository.
+
+1. Provide the [`json`](https://crates.io/crates/bitcoind-json-rpc-types) crate for use in
+   production software.
+2. Provide tools to the community for integration testing code written in Rust that interacts with
+   the Bitcoin network. Primarily consumers of the [`rust-bitcoin`](https://crates.io/crates/bitcoin)
+   library. And enable doing so against multiple versions of Bitcoin Core.
+
+If you require a JSON RPC client in production software it is expected you write your own and only
+use `json` in your dependency graph. Feel free to copy/steal/plagiarise or otherwise enjoy yourself
+with anything in this repository - no attribution required.
+
+**Please do not use `client` in production and raise bugs, issues, or feature requests.**
+
+## Crate listing
+
+- [`json`](https://crates.io/crates/bitcoind-json-rpc-types): Types returned by the JSON-RPC API of Bitcoin Core.
+- [`regtest`](https://crates.io/crates/bitcoind-json-rpc-regtest): Runs `bitcoind` regtest nodes.
+- [`client`](https://crates.io/crates/bitcoind-json-rpc-client): JSON-RPC client use to test `json`.
+- `integration_test`: Integration tests that use `client` and `regtest` to test `json`.
+
+## Original code
+
+I don't know who is using `bitcoind` and/or `rust-bitocincore-rpc` in the wild and I do not want to
+disrupt them. As such `bitcoind` was pulled in here with permission of the original author. Code
+from `rust-bitcoincore-rpc` was just shamelessy stolen. As such I have maintained the original
+author's list and added my own name for accountability. All bugs are my own (tcharding).
+
+- [rust-bitcoincore-rpcv0.19.0](https://github.com/rust-bitcoin/rust-bitcoincore-rpc)
+- [`bitcoind`](https://crates.io/crates/bitcoind)