Manifest updates

Typo fixes and change 'download entry source' to 'download entry' as
it's the tarball, not the source itself.

Rebuilt .entry.json and index.html files for all entries.

2012/hou/index.html

@@ -259,7 +259,7 @@ amount of spaghetti branches and virtual thread creations. Finally, the VM in
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/hou/try.sh">try.sh</a> - how to run</li>
 <li><a href="header.htm">header.htm</a> - HTML header</li>
 <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/hou/perl-notes.txt">perl-notes.txt</a> - notes about patho.pl</li>
-<li><a href="2012_hou.tar.bz2">2012_hou.tar.bz2</a> - download entry source</li>
+<li><a href="2012_hou.tar.bz2">2012_hou.tar.bz2</a> - download entry</li>
 </ul>
 <h2 id="secondary-files">Secondary files</h2>
 <ul>