add readthedocs + gitter buttons

README.md

@@ -1,5 +1,7 @@
 # Predictive Clinical Neuroscience Toolkit
-Predictive Clinical Neuroscience software toolkit (formerly nispat). Methods for normative modelling, spatial statistics and pattern recognition. A quickstart guide for running some of the major functions is provided at the bottom of this page
+Predictive Clinical Neuroscience software toolkit (formerly nispat). Methods for normative modelling, spatial statistics and pattern recognition. 
+
+[![Gitter](https://badges.gitter.im/predictive-clinical-neuroscience/community.svg)](https://gitter.im/predictive-clinical-neuroscience/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) [![Documentation Status](https://readthedocs.org/projects/pcntoolkit/badge/?version=latest)](https://pcntoolkit.readthedocs.io/en/latest/?badge=latest)
 
 ## Basic installation (on a local machine)