Change 'Best of show' to 'Best of Show'

This fixes an inconsistency in case. The spreadsheet in tmp,
year_prize.numbers and the year_prize.csv files were updated also (with
the ./fix_csv.sh run under tmp/).

There was no need to manually update the index.html, any other html
files or .entry.json files as I used sgit(1) to change the case.

2013/index.html

@@ -476,7 +476,7 @@ See also <a href="../faq.html">the IOCCC FAQ</a> for additional information on t
 <ul>
 <li><a href="birken/index.html">2013/birken</a> - Best painting tool</li>
 <li><a href="cable1/index.html">2013/cable1</a> - Most partisan 1-liner</li>
-<li><a href="cable2/index.html">2013/cable2</a> - Best of show</li>
+<li><a href="cable2/index.html">2013/cable2</a> - Best of Show</li>
 <li><a href="cable3/index.html">2013/cable3</a> - Largest small system emulator</li>
 <li><a href="dlowe/index.html">2013/dlowe</a> - Best sparkling utility</li>
 <li><a href="endoh1/index.html">2013/endoh1</a> - Most lazy SKIer</li>