Merge pull request #109 from plotly/gvwilson-patch-1

Update README.md with "maintained by community" badge

Author: gvwilson

README.md

@@ -1,2 +1,8 @@
 # plotly.r-docs
 The documentation for Ploty's R graphing library. 
+
+<div align="center">
+  <a href="https://dash.plotly.com/project-maintenance">
+    <img src="https://dash.plotly.com/assets/images/maintained-by-community.png" width="400px" alt="Maintained by the Plotly Community">
+  </a>
+</div>