Add features section

docs/index.rst

@@ -1,11 +1,25 @@
 HBMQTT
 ======
 
-``HBMQTT`` is an open source `MQTT`_ client and broker implementation. It implements `MQTT 3.1.1`_ protocol specifications
+``HBMQTT`` is an open source `MQTT`_ client and broker implementation.
 
 Built on top of :mod:`asyncio`, Python's standard asynchronous I/O framework, ``HBMQTT`` provides a straightforward API based on coroutines, making it easy to write
 highly concurrent applications.
 
+Features
+--------
+
+``HBMQTT`` implements the full set of `MQTT 3.1.1`_ protocol specifications and provides the following features:
+
+- Support QOS_0, QOS_1 and QOS_2 messages flow
+- Client auto-reconnection on network lost
+- Authentication through password file (more methods can be added through a plugin system)
+- Basic ``$SYS`` topics
+- TCP and websocket support
+- SSL support over TCP and websocket
+- Plugin system
+
+
 Requirements
 ------------