Added Python itself, and Shapely to the software requirements.

diff --git a/doc/project_overview/index.xhtml b/doc/project_overview/index.xhtml
index f7854f8371463e553b756b78444c554fe4f81250..8591cb4417bc8cd991d61440f15d2c30a779260b 100644 (file)
--- a/doc/project_overview/index.xhtml
+++ b/doc/project_overview/index.xhtml
@@ -75,6 +75,22 @@
   </p>
 
   <ol>
+    <li>
+      Most of the application code is written in <a
+      href="http://www.python.org/">Python</a>, and so the Python
+      runtime is required to run it.
+
+      <ol>
+       <li>
+         We utilize a third-party library called <a
+         href="http://pypi.python.org/pypi/Shapely">Shapely</a> for
+         Python/GEOS integration. GEOS is required by PostGIS (see
+         below), so it is not listed as a separate requirement, even
+         though Shapely does depend on it.
+       </li>
+      </ol>
+    </li>
+
     <li>
       The build system utilizes <a
       href="http://www.gnu.org/software/make/">GNU Make</a>. The