build: add dump of nm tool
add program to test rbtree student edition 1
clone rbtree student edition 1 to rbtree student edition 2
change key from void * to a pair of long ints, in rbtree student edition 2
clone rbtree student edition 2 to superanchor edition 3
add program to test rbtree student edition 1
clone rbtree student edition 1 to rbtree student edition 2
clone rbtree student edition 2 to superanchor edition 3
move key and tree anchor into super-anchor, superanchor edition 3