readme fix; docs on web page

README.md

@@ -12,4 +12,5 @@ github simply for backup.
 
 The original code was written by Marc S. Ressl. This is just a port: all the logic is due to them.
 
-- [https://github.com/Michaelangel007](Michaelangel007)
+People who have sent PRs to this repository include:
+- [Michaelangel007](https://github.com/Michaelangel007)

index.html

@@ -156,6 +156,18 @@
     <canvas id="d" width="768" height="576"></canvas>
   </div>
   </div><!-- class="wrapper" -->
+  <div class="notes">
+    <p>
+      This is a WebGL port by Zellyn Hunter of Marc S. Ressl's NTSC
+      emulation from OpenEmulator. The source code is <a href="https://github.com/zellyn/apple2shader">here</a>.
+    </p>
+    <p>You can find out more about OpenEmulator at
+      the <a href="http://openemulatorproject.github.io/">OpenEmulator
+      project website</a>, or download
+      a <a href="https://archive.org/details/OpenEmulatorSnapshots">recent
+      build from the Internet Archive</a>, thanks to 4am.
+    </p>
+  </div>
   <script>
     function updateDisplayConfig(config) {
       config.videoDecoder = document.getElementById('decoder').value;