Documentation Update - online docs

- Added new download.html page to list current and prior binary
  packages only.
- Removed old binary packages.
- Reduced versions.html to a concatenation of ChangeLog entries.

html/task.html

@@ -25,6 +25,7 @@
               <a href="faq.html">FAQ</a>
               <a href="versions.html">Old Versions</a>
               <a href="links.html">Task on the Web</a>
+              <a href="download.html">Download</a>
             </div>
 
             <div id="content">
@@ -112,7 +113,7 @@
               <div class="content">
                 <table>
                   <tr>
-                    <td>Source:</td>
+                    <td>Source</td>
                     <td><a href="http://www.beckingham.net/task-1.8.0.tar.gz">task-1.8.0.tar.gz</a></td>
                   </tr>
 <!--
@@ -136,7 +137,7 @@
                   </tr>
 -->
                   <tr>
-                    <td>Git - get the whole source and history:</td>
+                    <td>Git repository</td>
                     <td><a href="http://github.com/pbeckingham/task">http://github.com/pbeckingham/task</a></td>
                   </tr>
                 </table>
@@ -180,7 +181,9 @@
                 <p>
                   If you have difficulties building task, have found a bug, have a
                   suggestion for improvement, or a feature request, please send mail to
-                  <a href="mailto:task@beckingham.net">task@beckingham.net</a>.
+                  <a href="mailto:task@beckingham.net">task@beckingham.net</a>, or
+                  post a message to the
+                  <a href="mailto:taskprogram@googlegroups.com">taskprogram@googlegroups.com</a>.
                 </p>
 
                 <p>