Add README.md for bitcoincorehttp example.

Also, change the port in the example to the mainnet RPC port.

examples/bitcoincorehttp/README.md

@@ -0,0 +1,34 @@
+Bitcoin Core HTTP POST Example
+==============================
+
+This example shows how to use the btcrpcclient package to connect to a Bitcoin
+Core RPC server using HTTP POST mode with TLS disabled and gets the current
+block count.
+
+## Running the Example
+
+The first step is to use `go get` to download and install the btcrpcclient
+package:
+
+```bash
+$ go get github.com/conformal/btcrpcclient
+```
+
+Next, modify the `main.go` source to specify the correct RPC username and
+password for the RPC server:
+
+```Go
+	User: "yourrpcuser",
+	Pass: "yourrpcpass",
+```
+
+Finally, navigate to the example's directory and run it with:
+
+```bash
+$ cd $GOPATH/src/github.com/conformal/btcrpcclient/examples/bitcoincorehttp
+$ go run *.go
+```
+
+## License
+
+This example is licensed under the [copyfree](http://copyfree.org) ISC License.

examples/bitcoincorehttp/main.go

@@ -12,7 +12,7 @@ import (
 func main() {
 	// Connect to local bitcoin core RPC server using HTTP POST mode.
 	connCfg := &btcrpcclient.ConnConfig{
-		Host:         "localhost:18332",
+		Host:         "localhost:8332",
 		User:         "yourrpcuser",
 		Pass:         "yourrpcpass",
 		HttpPostMode: true, // Bitcoin core only supports HTTP POST mode