Updated README

Author: MSeal

README.md

@@ -1,5 +1,34 @@
+[![Travis Build Status](https://travis-ci.org/jupyter/nbclient.svg?branch=master)](https://travis-ci.org/jupyter/nbclient)
+[![image](https://codecov.io/github/jupyter/nbclient/coverage.svg?branch=master)](https://codecov.io/github/jupyter/nbclient?branch=master)
+[![Python 3.5](https://img.shields.io/badge/python-3.5-blue.svg)](https://www.python.org/downloads/release/python-350/)
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+
 # nbclient
 
 A client library for executing notebooks. Formally nbconvert's ExecutePreprocessor.
 
-## TODO: Add more details here!
+**NBClient** is a tool for parameterizing and executing Jupyter Notebooks.
+
+NBClient lets you:
+
+    **execute** notebooks
+
+Similar in nature to jupyter_client, as the jupyter_client is to the jupyter
+protocol nbclient is to notebooks allowing for execution contexts to be run.
+
+## Origins
+
+This library used to be part of [nbconvert](https://nbconvert.readthedocs.io/en/latest/) and was extracted into it's own library for easier updating and importing by downstream libraries and applications.
+
+## Python Version Support
+
+This library currently supports python 3.5+ verisons. As minor python
+versions are officially sunset by the python org nbclient will similarly
+drop support in the future.
+
+## Documentation
+
+See [readthedocs](https://nbclient.readthedocs.io/en/latest/) for more in-depth details about the project and API capabilities.