update sitemap and 2013/morgan1/index.html

2013/.filelist

@@ -1,11 +1,11 @@
 2013/2013.tar.bz2
+2013/Makefile
+2013/README.md
 2013/.filelist
 2013/.gitignore
 2013/guidelines.txt
 2013/index.html
 2013/iocccsize.c
 2013/iocccsize.mk
-2013/Makefile
-2013/README.md
 2013/rules.txt
 2013/.year

2013/morgan1/index.html

@@ -144,11 +144,18 @@ Morgan</a><br> Location: <a href="../../location.html#FR">FR</a> -
 <h2 id="to-use">To use:</h2>
 <div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;YYYY/MM/DD&quot;</span> <span class="kw">|</span> <span class="ex">./morgan1</span></span></code></pre></div>
 <p>where <code>YYYY</code> is the four digit year, <code>MM</code> is
-the two digit month and <code>DD</code> is two digit day of the
-month.</p>
+the two digit month and <code>DD</code> is two digit day of the month.
+The arrow keys control the shifting of the date as follows:</p>
+<ul>
+<li>Right : go forwards one day.</li>
+<li>Left : go backwards one day.</li>
+<li>Up : go forwards 20 days.</li>
+<li>Down : go backwards 20 days.</li>
+</ul>
 <h2 id="try">Try:</h2>
 <div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
-<p>Try pressing the arrow keys when your focus is in the window.</p>
+<p>Use the same keys as described above to change the dates each time
+the program window is in focus.</p>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>To verify the output, try echoing the date of an evening with a clear
 sky. Use binoculars and/or telescope as needed. In some cases you may