add badgets

docs/header.rst

@@ -1,7 +1,24 @@
 =========================================================
-demuxEM for cell-hashing/nucleus-hashing data analysis 
+demuxEM for cell-hashing/nucleus-hashing data analysis
 =========================================================
 
+|PyPI| |Conda| |Python| |License| |Docs|
+
+.. |PyPI| image:: https://img.shields.io/pypi/v/demuxEM.svg
+   :target: https://pypi.org/project/demuxEM
+
+.. |Conda| image:: https://img.shields.io/conda/v/bioconda/demuxem
+   :target: https://anaconda.org/bioconda/demuxem
+
+.. |Python| image:: https://img.shields.io/pypi/pyversions/demuxEM.svg
+   :target: https://pypi.org/project/demuxEM
+
+.. |Docs| image:: https://readthedocs.org/projects/demuxem/badge/?version=latest
+   :target: https://demuxEM.readthedocs.io
+
+.. |License| image:: https://img.shields.io/github/license/lilab-bcb/demuxEM
+   :target: https://github.com/lilab-bcb/demuxEM/blob/master/LICENSE
+
 demuxEM is a module on analyzing cell-hashing/nucleus-hashing data. It's used by `Cumulus`_ in demultiplexing step.
 
-.. _Cumulus: https://cumulus.readthedocs.io
+.. _Cumulus: https://cumulus.readthedocs.io