Added initial version of the README.

README.md

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+pyAD2 - Python library for the AD2 device family
+================================================
+
+This Python module aims to provide a consistent interface for all of the AD2
+product line, including the AD2USB, AD2SERIAL and AD2PI devices.  This also
+includes devices that have been exposed via [ser2sock](http://github.com/nutechsoftware/ser2sock) and supports encryption
+via SSL/TLS.
+
+Installation
+------------
+
+pyAD2 can be installed through pip:
+    pip install pyad2
+
+or from source:
+    python setup.py install
+
+Requirements
+------------
+* [pyopenssl](https://launchpad.net/pyopenssl)
+* [pyusb](http://sourceforge.net/apps/trac/pyusb/) >= 1.0.0b1
+* [pyserial](http://pyserial.sourceforge.net/) >= 2.7
+* [pyftdi](https://github.com/eblot/pyftdi) >= 0.9.0
+
+Documentation
+-------------
+
+API documentation can be found [here](http://github.com/nutechsoftware/pyad2/tree/master/docs/_build/html).
+
+Examples
+--------
+
+Basic usage:
+
+```python
+
+```
+
+Please see the [examples](http://github.com/nutechsoftware/pyad2/tree/master/examples) directory for more.