Update README

Author: shesek

Readme.md

@@ -3,8 +3,9 @@
 Utility to run a regtest electrum wallet daemon process, useful in integration testing environment.
 
 ```rust
-let electrumd = electrumd::ElectrumD::new(electrumd::downloaded_exe_path().unwrap()).unwrap();
-assert_eq!(0, bitcoind.client.get_blockchain_info().unwrap().blocks);
+let electrum_wallet = electrumd::ElectrumD::new(electrumd::downloaded_exe_path().unwrap()).unwrap();
+
+let addr = electrum_wallet.call("createnewaddress", &json!([]))
 ```
 
 Forked from [@RCasatta's `bitcoind`](https://github.com/RCasatta/bitcoind).