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).

2001/dgbeards/README.md

@@ -65,7 +65,7 @@ Of particular interest is the author's decision that the program should
 crash if it loses.  I've played chess with a lot of people like that, and
 I appreciate the realism.
 
-BTW: if your goal is to lose and you do does that mean you win? :-) What does
+**BTW**: if your goal is to lose and you do does that mean you win? :-) What does
 winning mean in a game you're supposed to lose at?