Fixes and updates to 2001/anonymous

The alt target list now includes the supplementary program I added.

There were some problems fixed in the README.md file that occurred when
the (far superior) thanks-for-fixes.md file was introduced.

The thanks file was updated as well.

2001/anonymous/Makefile

@@ -120,8 +120,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG} ${PROG}.ten ${PROG}.ten.64 ${PROG}.bed ${PROG}.bed.64
 #
-ALT_OBJ= ${PROG}.ten.64.o
-ALT_TARGET= ${PROG}.ten.64
+ALT_OBJ= ${PROG}.ten.64.o ${PROG}.bed.64.o
+ALT_TARGET= ${PROG}.ten.64 ${PROG}.bed.64
 
 
 #################