Add usage information

README.md

 rmqplus proxy a web request to RabbitMQ.
 
-Example of WASD rule :
+## Installation
+1. Create file rmqpluscmd.com <br>
+`copy rmqpluscmd.template file to rmqpluscmd.com`
+2. Edit rmqpluscmd.com and update at least
+   - RMQPLUS_HOSTNAME
+   - RMQPLUS_USERNAME
+   - RMQPLUS_PASSWORD
+3. Set the WASD rules
+   - example:
 ```
 set /rmqplus/* script=query=relaxed
 set /rmqplus/* throttle=1,,,30
@@ -9,4 +17,13 @@
 set /rmqplus/* ods=5 script=syntax=unix
 set /rmqplus/* cgiprefix=""
 script+ /rmqplus/* /dev/dir/rmqpluscmd*
-```
+```
\ No newline at end of file
+4. Optional run the provided example<br>
+   - create a RabbitMQ `rpc_queue` queue
+   - run the python example server<br>
+`python rpc_server.py ip_rabbitmq_server username password`
+   - Execute a test request<br>
+`http://wasd_server/rmqplus//?FirstField=for&SecondField=other`
+   - This should display a result json
+  ```json
+  {"status": 1, "value": "for other"}```