More update of developer instructions

Author: BruceSherwood

docs/GlowScriptDocs/local.html

@@ -38,15 +38,16 @@ <h1 class="Heading-1"> <font color="#0000A0">Running locally</font></h1>
         <p class="Normal">Another option is to install Python and the VPython 7 module. At <a href="https://vpython.org"><strong>vpython.org</strong></a> see the section on using VPython with installed Python. As long as you don't import Python modules other than vpython, you will also be able to run the program at glowscript.org without having to make changes.        </p>
         <p class="Normal"><strong>* For developers</strong><br />
         If  you want to be able to contribute to developing GlowScript, here are the (rather complex) steps required to be able to run locally with changes that you make to the GlowScript code, almost all of which is written in JavaScript (there is also some Python server code and some html code).</p>
-        <p class="Normal"><strong>* Read an overview of the VPython architecture</strong><br />
-          See <a href="https://vpython.org/contents/VPythonArchitecture.pdf" target="_blank">https://vpython.org/contents/VPythonArchitecture.pdf</a></p>
+        <p class="Normal"><strong>* Read overviews of the VPython architecture</strong><br />
+          See <a href="https://vpython.org/contents/VPythonArchitecture.pdf" target="_blank"><strong>vpython.org/contents/VPythonArchitecture.pdf</strong></a> and<br>
+        <a href="https://github.com/vpython/glowscript/blob/master/docs/GlowScriptOverview.txt" target="_blank"><strong>github.com/vpython/glowscript/blob/master/docs/GlowScriptOverview.txt</strong></a></p>
         <p class="Normal"><strong>* Install Python 2.7 (python.org).</strong> Google App Engine currently requires Python 2.7        </p>
         <p class="Normal"><strong>* Download the GlowScript source files</strong><br />
           At the glowscript repository on GitHub, <a href="https://github.com/vpython/glowscript" target="_blank">https://github.com/vpython/glowscript</a>, clone the repository, or click on &quot;Download ZIP&quot; and unpack the zip file into a new folder  named glowscript. On Linux, place this folder parallel to the google_appengine folder.        </p>
         <p class="Normal"><strong>* Install the Google Cloud SDK for Python</strong><br />
           At <a href="https://developers.google.com/appengine/downloads" target="_blank"><strong>developers.google.com/appengine/downloads</strong></a>. Choose Standard environment Python for your platform. Next, if you have not already installed the Google Cloud SDK (&quot;Software Development Kit&quot;), do this:<br>
           1) 
-          If you do not already have Pythnon 2.7 installed, click the Download button for &quot;Install Python version 2.7&quot;.<br>
+          If you do not already have Python 2.7 installed, click the Download button for &quot;Install Python version 2.7&quot;.<br>
           2) 
 click the Download button for &quot;Install and initialize Google Cloud SDK&quot;.<br>
 3)