Update README.md

Author: Bhupesh-V

README.md

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 ![PyPI](https://img.shields.io/pypi/v/plagcheck?color=blue)
 [![Build Status](https://travis-ci.org/codeclassroom/PlagCheck.svg?branch=master)](https://travis-ci.org/codeclassroom/PlagCheck)
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/plagcheck)
+[![Documentation Status](https://readthedocs.org/projects/plagcheck/badge/?version=latest)](https://plagcheck.readthedocs.io/en/latest/?badge=latest)
 [![GitHub license](https://img.shields.io/github/license/codeclassroom/PlagCheck)](https://github.com/codeclassroom/CodeRunner/blob/master/LICENSE)
 ![PyPI - Downloads](https://img.shields.io/pypi/dm/plagcheck?color=blue)
-[![GitHub issues](https://img.shields.io/github/issues/codeclassroom/PlagCheck?color=blueviolet)](https://github.com/codeclassroom/CodeRunner/issues)
-[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-orange.svg)](http://makeapullrequest.com)
+
 
 > A Powerful [MOSS](http://theory.stanford.edu/~aiken/moss/) results scrapper.