Update README

README.rst

@@ -1,6 +1,20 @@
 BIOL 300 Wiki Documentation
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+.. image:: https://readthedocs.org/projects/biol-300-wiki-docs/badge/?version=latest
+    :target: ReadTheDocs_
+    :alt: Documentation Status
+
+This repository contains the source code for generating documentation that
+explains how to build a wiki_ for the course BIOL 300. The source code is
+automatically recompiled each time it is changed, and the compiled documentation
+is hosted on ReadTheDocs_. The source code can also be compiled on your local
+computer using the basic instructions below.
+
+.. _ReadTheDocs:    https://biol-300-wiki-docs.readthedocs.io/
+.. _wiki:           https://biol300.case.edu/
+
+
 Dependencies
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