Various fixes and updates

Make lines beginning (in markdown files) 'BTW' bold. Rebuilt the
respective html pages.

Slight update to abstract in two entries (1985/shapiro and
1994/shapiro). One is changing 'defines' to '#defines' and the other was
a typo fix.

Fixed make gen_next: added missing new files.

Various fixes in next/register.html (typos and other things).

1985/shapiro/index.html

@@ -406,7 +406,7 @@
   </a>
   <h1>The International Obfuscated C Code Contest</h1>
   <h2>1985/shapiro - Grand Prize - Most well rounded in confusion</h2>
-  <h3>two defines one 7-liner that results in a maze</h3>
+  <h3>two #defines one 7-liner that results in a maze</h3>
 </div>
 
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