Update links to the new and old GlowScript repositories

Author: BruceSherwood

README.md

@@ -9,3 +9,7 @@ Full documentation for users is provided: at glowscript.org, click Help at the u
    http://www.glowscript.org/#/user/GlowScriptDemos/folder/Examples/program/Bounce
 
 GlowScript was inspired by VPython and has similar syntax. The project was begun in 2011 by David Scherer and Bruce Sherwood.
+
+In December 2014 the original GlowScript repository was corrupted in such a way that it could not be reconstituted, but a backup that contains the history of commits is here:
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+   https://bitbucket.org/davidscherer/glowscript_backup/overview

docs/GlowScriptDocs/index.html

@@ -128,7 +128,7 @@
 //-->
 
 </script>
-in the summer of 2011. Here is an <a href="http://matterandinteractions.wordpress.com/2011/09/23/glowscript-3d-animations-in-a-browser/" target="_blank"><strong>overview</strong></a> of the project, and here is a <a href="history.html"><strong>log of developments</strong></a>. Here is the <a href="https://bitbucket.org/davidscherer/glowscript" target="_blank"><strong>open source</strong></a> for this project. Some <a href="technical.html"><strong>technical overviews</strong></a> are available.</p>
+in the summer of 2011. Here is an <a href="http://matterandinteractions.wordpress.com/2011/09/23/glowscript-3d-animations-in-a-browser/" target="_blank"><strong>overview</strong></a> of the project, and here is a <a href="history.html"><strong>log of developments</strong></a>. Here is the <a href="https://github.com/BruceSherwood/glowscript" target="_blank"><strong>open source</strong></a> for this project. Some <a href="technical.html"><strong>technical overviews</strong></a> are available.</p>
       <p class="Normal">Descriptions of the options available at the top of the page:</p>
       <blockquote>
         <p class="Normal"><span class="style2"><strong><a href="primitives.html">Pictures of 3D objects:</a></strong></span> What