Updated README.md with info about DOI.

Author: cboulay

README.md

@@ -1,6 +1,7 @@
 [![GitHub Actions Status](https://github.com/sccn/liblsl/workflows/C%2FC++%20CI/badge.svg)](https://github.com/sccn/liblsl/actions)
 [![Travis Build Status](https://travis-ci.org/sccn/liblsl.svg?branch=master)](https://travis-ci.org/sccn/liblsl)
 [![Azure Build Status](https://dev.azure.com/labstreaminglayer/liblsl/_apis/build/status/sccn.liblsl?branchName=master)](https://dev.azure.com/labstreaminglayer/liblsl/_build/latest?definitionId=1&branchName=master)
+[![DOI](https://zenodo.org/badge/123265865.svg)](https://zenodo.org/badge/latestdoi/123265865)
 
 # Lab Streaming Layer library
 
@@ -91,3 +92,9 @@ The library uses code that is licensed under the Boost software license.
 # Acknowledgements
 
 The original version of this software was written at the Swartz Center for Computational Neuroscience, UCSD. This work was funded by the Army Research Laboratory under Cooperative Agreement Number W911NF-10-2-0022 as well as through NINDS grant 3R01NS047293-06S1.
+
+# Citing liblsl
+
+[![DOI](https://zenodo.org/badge/123265865.svg)](https://zenodo.org/badge/latestdoi/123265865)
+
+Information about versioning: https://help.zenodo.org/#versioning