update: readme

Author: amirhnajafiz

README.md

@@ -1,2 +1,30 @@
-# stallion-python-sdk
-Client sdk for Stallion message broker.
+# Stallion Python SDK
+
+Client SDK for **Stallion** message broker.
+
+## How to use?
+### Client
+Create a client:
+```python
+from client import Client
+
+c = Client(url="localhost:9090")
+```
+
+### Publish
+```python
+c.Publish("book", {'author': "Amirhossein", 'name': "Stallion"})
+```
+
+### Subscribe
+```python
+def handler(data):
+    print(data)
+
+c.Subscribe("book", handler)
+```
+
+### Unsubscribe
+```python
+c.Unsubscribe("book")
+```

test.py

@@ -23,3 +23,6 @@ def handler(data):
 
     # publish messages over a topic
     c.Publish("book", {'author': "Amirhossein", 'name': "Stallion"})
+
+    # unsubscribe
+    c.Unsubscribe("book")