Added serialization.rst file to scenarios.

docs/scenarios/serialization.rst

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+==================
+Data Serialization
+==================
+
+What is data serialization?
+---------------------------
+
+Data serialization is the concept of converting structured data into a format 
+that allows it to be shared or stored in such a way that its original 
+structure to be recovered. In some cases, the secondary intention of data 
+serialization is to minimize the size of the serialized data which then 
+minimizes disk space or bandwidth requirements.
+
+Pickle
+------
+
+The native data serialization module for Python is called `Pickle 
+<https://docs.python.org/2/library/pickle.html>`_. 
+
+Here's an example:
+
+.. code-block:: python
+       
+        import pickle
+        
+        #Here's an example dict
+        grades = { 'Alice': 89, 'Bob': 72, 'Charles': 87 }
+      
+        #Use dumps to convert the object to a serialized string
+        serial_grades = pickle.dumps( grades )
+       
+        #Use loads to de-serialize an object 
+        received_grades = pickle.loads( serial_grades )
+
+Protobuf
+--------
+
+If you're looking for a serialization module that has support in multiple 
+languages, Google's `Protobuf 
+<https://developers.google.com/protocol-buffers>`_ library is an option.