DUE Friday, FEB. 26TH. Submit your java files to inquire by the beginning of class.
  Write a class in Java called BinaryTree, which represents
  a binary search tree.  You can chose either implementation you
  prefer for storage, but at the very least:
insert, delete,
    and lookup.  For lookup, your function should return
    True if it finds it, and False otherwise.
  Create a program you can use to test your program. Make sure you test all of the methods of your classes.