shelf addition working, deletion failing

need to make deletion functional
also reassign children to correct node.
conquer the valgrind seas of errors!
update TODO with delete info
fixed double free corruption error in find test
reopened for debugging
work on changing find, not done yet
Improvements to add complete
commented some debug statements

commented debugging prints for BookShelfFind(),
BookShelfAdd(), and their tests.
start of deletion tests

find and add have issues, too
first stage of BookShelfDelete, must do children
some overall find, add, delete work
work on delete and find, find broken
some steps in the right directon (find/del)
done with branch

will fix delete later