adds docs for luadns

docs/dns/drivers/luadns.rst

@@ -0,0 +1,25 @@
+Luadns DNS Driver Documentation
+===============================
+
+I was a happy user of a free DNS hosting service for many years, when this service was acquired by a competitor in august 2011, I was forced to move somewhere else.
+
+While migrating my zone files I realized that I don't like Bind syntax files neither administering tens of domains through a web interface. I've started to experiment on how it should look a perfect DNS service for me. I've realized that I would love to store my configuration files in a Git repository and I would need some configuration language for templating (Lua).
+
+This is how LuaDNS was born on October, 2011.
+
+Read more at: http://luadns.com/
+
+Instantiating the driver
+------------------------
+
+.. literalinclude:: /examples/dns/luadns/instantiate_driver.py
+   :language: python
+
+API Docs
+--------
+
+.. autoclass:: libcloud.dns.drivers.luadns.LuadnsDNSDriver
+    :members:
+    :inherited-members:
+
+.. _`Luadns`: http://luadns.com/