docs: Update README.

README.rst

@@ -8,13 +8,33 @@ Cast All The Things
 .. image:: https://img.shields.io/travis/skorokithakis/catt.svg
         :target: https://travis-ci.org/skorokithakis/catt
 
-.. image:: https://readthedocs.org/projects/catt/badge/?version=latest
-        :target: https://readthedocs.org/projects/catt/?badge=latest
-        :alt: Documentation Status
-
 
 Cast All The Things allows you to send videos from many, many online sources to your Chromecast.
 
+Installation
+------------
+
+You can install Cast All The Things with pip::
+
+    pip install catt
+
+Usage
+-----
+
+To use Cast All The Things, just specify a URL::
+
+    catt cast "https://www.youtube.com/watch?v=VZMfhtKa-wo"
+
+CATT supports any service that youtube-dl supports, which includes most online
+video hosting services.
+
+You can also control your Chromecast through ``catt`` commands, for example with
+``catt pause``. Try running ``catt --help`` to see the full list of commands.
+
+
+Info
+----
+
 * Free software: BSD license
 * Documentation: https://catt.readthedocs.org.