convert 3-author programs to use proper_name

convert 3-author programs to use proper_name

g grep -E -l 'define AUTHORS "[^,]+", "[^,]+", "[^,]+"$'|xargs perl -pi -e \
  's/(define AUTHORS) ("[^,]+"), ("[^,]+"), ("[^,]+")$/$1 \\\n  proper_name ($2), \\\n  proper_name ($3), \\\n  proper_name ($4)/'