Fixes to 2001/anonymous

This unfortunately does not include making this work in modern systems.
I have used the cpp and I have had some ideas but I don't have a system
where I can test any fixes so it's probably not going to be done by me.

Nevertheless I have fixed the formatting of README.md, noted that it
doesn't seem to work (Yusuke Endoh came to the same conclusion) and also
fixed a typo in anonymous.ten.c (which 'sings' the wonderful English
counting song Ten Green Bottles .. or at least the theory is it's
English).

This entry has been added to the bugs.md file and I have provided a
number of hints that might (or then again might not) help for anyone who
is brave enough to try fixing it.

As far as the change to anonymous.c itself: I simply added some #includes
for functions that are used.

2001/anonymous/Makefile

@@ -190,12 +190,12 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
+	@echo "NOTE: this entry seems to no longer work."
 	magic='${CC} ${CFLAGS}'; \
 	X='-DA(X)=#X'; \
 	warning='-Dprocessor'; \
 	$$magic $$warning -Dmagic= $$X "-DX=A($$magic \"$$X\")" \
 		$< -o $@ ${LIBS}
-		anonymous.c
 
 # alternative executable
 #