Attempt at updating project info

As a newbie OPC UA adventurer being confused about the current state and available components of this project, here's an attempt at making index.md slightly more current.

Also update wording to be more consistent and homogenise layout.

Based on failing experiences when installing pip packages as directed and cursory inspection of project repositories so excuse any inaccuracies.

Author: mikini

index.md

@@ -1,11 +1,17 @@
-FreeOpcUa is a project to implement an open-source (LGPL) OPC-UA stack and associated tools. 
+FreeOpcUa is a project to implement an open-source (LGPL/GPL) OPC-UA stack and associated tools. 
 
 Currently FreeOpcUa is composed of
-* A LGPL C++ library to develop server and client OPC-UA applications. Python bindings can be found in the opcua-python repository. https://github.com/FreeOpcUa/freeopcua
-* A LGPL Python OPC-UA Python Client and Server library, written entirely in python, available at: https://github.com/FreeOpcUa/python-opcua (install using pip install opcua)
-* A GUI client https://github.com/FreeOpcUa/opcua-client-gui (install using pip install freeopcua-client)
-* Command line tools installed with freeopcua-python https://github.com/FreeOpcUa/python-opcua/tree/master/tools 
-* A GUI to create OPC UA nodes and save them to xml https://github.com/FreeOpcUa/opcua-modeler
+* A LGPL C++ library to develop server and client OPC-UA applications: https://github.com/FreeOpcUa/freeopcua
+  * Python bindings can be found in the [python](https://github.com/FreeOpcUa/freeopcua/tree/master/python) subdirectory
+* A synchronous LGPL Python OPC-UA client and server library (written entirely in Python): https://github.com/FreeOpcUa/python-opcua
+  * Install using `pip install opcua`
+  * Command line tools can be found in the [tools](https://github.com/FreeOpcUa/python-opcua/tree/master/tools) subdirectory ([doc](https://github.com/FreeOpcUa/python-opcua#documentation))
+* An asynchronous LGPL Python OPC-UA client and server library (using [asyncio](https://docs.python.org/3/library/asyncio.html) aka. [PEP 3156](https://www.python.org/dev/peps/pep-3156/)): https://github.com/FreeOpcUa/opcua-asyncio
+
+* A GPL Python GUI client: https://github.com/FreeOpcUa/opcua-client-gui
+  * Install using `pip install opcua-client`
+* A GPL Python GUI to create OPC-UA nodes and save them to xml: https://github.com/FreeOpcUa/opcua-modeler
+  * Install using `pip install opcua-modeler`
 
 * Mailing list: https://groups.google.com/forum/#!forum/freeopcua
 * Source code: https://github.com/FreeOpcUa