Improve bin/output-year-index.sh

Make it consistent with my improvement to bin/gen-years.sh: the entry
awards in the links (to each entry) are now in bold and so are the link
names. This helps them stand out a bit more.

2015/index.html

@@ -489,20 +489,20 @@ send us the fix (patch file or the entire changed file).</p>
 </div>
 <p><a href="2015.tar.bz2"><strong>Download all winning entries from 2015</strong></a></p>
 <ul>
-<li><a href="burton/index.html">2015/burton</a> - Most useful</li>
-<li><a href="dogon/index.html">2015/dogon</a> - Most crafty</li>
-<li><a href="duble/index.html">2015/duble</a> - Best handwriting</li>
-<li><a href="endoh1/index.html">2015/endoh1</a> - Most diffused reaction</li>
-<li><a href="endoh2/index.html">2015/endoh2</a> - Most overlooked obfuscation</li>
-<li><a href="endoh3/index.html">2015/endoh3</a> - Back to the Future Award</li>
-<li><a href="endoh4/index.html">2015/endoh4</a> - Best one liner</li>
-<li><a href="hou/index.html">2015/hou</a> - Most well rounded hash</li>
-<li><a href="howe/index.html">2015/howe</a> - Most different</li>
-<li><a href="mills1/index.html">2015/mills1</a> - For the Birds! Award</li>
-<li><a href="mills2/index.html">2015/mills2</a> - Most compact</li>
-<li><a href="muth/index.html">2015/muth</a> - Most complete use of CPP</li>
-<li><a href="schweikhardt/index.html">2015/schweikhardt</a> - Best documented</li>
-<li><a href="yang/index.html">2015/yang</a> - Most pointed reaction</li>
+<li><a href="burton/index.html">2015/burton</a> - <strong>Most useful</strong></li>
+<li><a href="dogon/index.html">2015/dogon</a> - <strong>Most crafty</strong></li>
+<li><a href="duble/index.html">2015/duble</a> - <strong>Best handwriting</strong></li>
+<li><a href="endoh1/index.html">2015/endoh1</a> - <strong>Most diffused reaction</strong></li>
+<li><a href="endoh2/index.html">2015/endoh2</a> - <strong>Most overlooked obfuscation</strong></li>
+<li><a href="endoh3/index.html">2015/endoh3</a> - <strong>Back to the Future Award</strong></li>
+<li><a href="endoh4/index.html">2015/endoh4</a> - <strong>Best one liner</strong></li>
+<li><a href="hou/index.html">2015/hou</a> - <strong>Most well rounded hash</strong></li>
+<li><a href="howe/index.html">2015/howe</a> - <strong>Most different</strong></li>
+<li><a href="mills1/index.html">2015/mills1</a> - <strong>For the Birds! Award</strong></li>
+<li><a href="mills2/index.html">2015/mills2</a> - <strong>Most compact</strong></li>
+<li><a href="muth/index.html">2015/muth</a> - <strong>Most complete use of CPP</strong></li>
+<li><a href="schweikhardt/index.html">2015/schweikhardt</a> - <strong>Best documented</strong></li>
+<li><a href="yang/index.html">2015/yang</a> - <strong>Most pointed reaction</strong></li>
 </ul>
 <hr style="width:10%;text-align:left;margin-left:0">
 <h4>