Issue pythonarcade#146, add release notes to documentation.

doc/index.rst

@@ -40,6 +40,12 @@ The Python Arcade Library
           <h2><a href="sample_games.html">Example Games</a></h2>
         </td>
         <td>
+          <img style="width:78px;" src="_static/code.svg"><br/>
+          <h2>Source Code</h2>
+          <ul>
+            <li><a href="https://github.com/pvcraven/arcade">GitHub</a></li>
+            <li><a href="release_notes.html">Release Notes</a></li>
+          </ul>
         </td>
       </tr>
     </table>

doc/release_notes.rst

@@ -0,0 +1,27 @@
+:orphan:
+
+.. _release_notes:
+
+Release Notes
+=============
+
+Version 1.2.2
+-------------
+
+Bug Fixes
+~~~~~~~~~
+
+* `Issue 143 <https://github.com/pvcraven/arcade/issues/143>`_: Error thrown when using scroll wheel
+* `Issue 128 <https://github.com/pvcraven/arcade/issues/128>`_: Fix infinite loop in physics engine
+* `Issue 127 <https://github.com/pvcraven/arcade/issues/127>`_: Fix bug around warning with Python 3.6 when imported
+* `Issue 125 <https://github.com/pvcraven/arcade/issues/125>`_: Fix bug when creating window on Linux
+
+Enhancements
+~~~~~~~~~~~~
+* `Issue 146 <https://github.com/pvcraven/arcade/issues/146>`_: Add release notes to documentation
+* `Issue 144 <https://github.com/pvcraven/arcade/issues/144>`_: Add code to get window and viewport dimensions
+* `Issue 139 <https://github.com/pvcraven/arcade/issues/139>`_: Add documentation on what ``collision_radius`` is
+* `Issue 131 <https://github.com/pvcraven/arcade/issues/131>`_: Add example code on how to do full-screen games
+* `Issue 113 <https://github.com/pvcraven/arcade/issues/113>`_: Add example code showing enemy turning around when hitting a wall
+* `Issue 67 <https://github.com/pvcraven/arcade/issues/67>`_: Improved support and documentation for joystick/game controllers
+