Format and other fixes in 2020/ferguson1

Fixed formatting in the markdown files. I did not check for typos due to
the fact I wrote so much (which I'm only sorry about in the sense that
it's too much to go through for almost everyone and this might make some
people miss useful/interesting things. If I had 'more "time" ' maybe I
could shorten it but I don't).

Renamed crazy.log to crazy.log.md. Updated Makefile for the DATA
variable.

Corrected file names in some cases.

Fixed formatting in man page.

There is one other change I have in 2020/ferguson1 but it's also needed
in 2020/ferguson2 so I'll do that at the same time.

2020/ferguson1/Makefile

@@ -114,7 +114,7 @@ PROG= prog
 #
 OBJ= ${PROG}.o
 DATA= COMPILING.md HACKING.md bugs.html bugs.md cake.jpg cannibalism.log.md \
-	chocolate-cake.html chocolate-cake.md crazy.log gameplay.html gameplay.md \
+	chocolate-cake.html chocolate-cake.md crazy.log.md gameplay.html gameplay.md \
 	halfwidth_vs_fullwidth.png ioccc-cake.jpg play.sh prog.2.c prog.3-j.c \
 	prog.3.c snake-colours.sh snake.1 spoilers.html spoilers.md \
 	termcaps.c terminals.html terminals.md troubleshooting.html troubleshooting.md