Added badges to README.

README.rst

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 Rigidity
 ========
 
+.. image:: https://travis-ci.org/austinhartzheim/rigidity.svg?branch=master
+   :target: https://travis-ci.org/austinhartzheim/rigidity
+.. image:: https://coveralls.io/repos/austinhartzheim/rigidity/badge.svg?branch=master&service=github
+   :target: https://coveralls.io/github/austinhartzheim/rigidity?branch=master 
+
 Rigidity is a simple wrapper to Python's built-in `csv` module that allows for validation and correction of data being read/written to/from CSV files.
 
 This module allows you to easily construct validation and correction rulesets to be applied automatically while preserving the `csv` interface. In other words, you can easily upgrade old code to better adhere to new output styles, or allow new code to better parse old files.