Merge pull request #1434 from OpenChemistry/readme-changes

Update README.md

Author: ghutchis

README.md

@@ -1,6 +1,8 @@
 # ![Avogadro 2][Avogadro2Logo] Avogadro 2
 
-[![Latest Release](https://img.shields.io/github/v/release/openchemistry/avogadrolibs)](https://github.com/OpenChemistry/avogadrolibs/releases) [![BSD License](https://img.shields.io/github/license/openchemistry/avogadrolibs)](https://github.com/OpenChemistry/avogadrolibs/blob/master/LICENSE) [![Build Status](https://img.shields.io/github/actions/workflow/status/openchemistry/avogadrolibs/build_cmake.yml?branch=master)](https://github.com/OpenChemistry/avogadrolibs/actions) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](http://makeapullrequest.com) [![GitHub contributors](https://img.shields.io/github/contributors/openchemistry/avogadrolibs.svg?style=flat)](https://github.com/OpenChemistry/avogadrolibs/graphs/contributors)  [![OpenCollective Backers](https://img.shields.io/opencollective/all/open-chemistry)](https://opencollective.com/open-chemistry)
+[![Latest Release](https://img.shields.io/github/v/release/openchemistry/avogadrolibs)](https://github.com/OpenChemistry/avogadrolibs/releases) [![BSD License](https://img.shields.io/github/license/openchemistry/avogadrolibs)](https://github.com/OpenChemistry/avogadrolibs/blob/master/LICENSE) [![Build Status](https://img.shields.io/github/actions/workflow/status/openchemistry/avogadrolibs/build_cmake.yml?branch=master)](https://github.com/OpenChemistry/avogadrolibs/actions) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/44bb12662c564ed8a27ee8a7fd89ed50)](https://app.codacy.com/gh/OpenChemistry/avogadrolibs/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)  
+[![Download Count](https://avogadro.cc/downloads.svg)](https://github.com/OpenChemistry/avogadrolibs/releases) [![Citation Count](https://avogadro.cc/citations.svg)](http://doi.org/10.1186/1758-2946-4-17)  
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat)](http://makeapullrequest.com) [![GitHub contributors](https://img.shields.io/github/contributors/openchemistry/avogadrolibs.svg?style=flat&color=0bf)](https://github.com/OpenChemistry/avogadrolibs/graphs/contributors)  [![OpenCollective Backers](https://img.shields.io/opencollective/all/open-chemistry)](https://opencollective.com/open-chemistry)
 
 ## Introduction