Code clean-up in Tree.
Another session of code clean-up.
Added BinaryTree as new data structure.
Wrote instantiation test for BinaryTree.
Some tests added for BinaryTree.
More tests and methods added to BinaryTree.
Test for insertRightChild added for BinaryTree.
Re-factored BinaryTree.
Typo fixed.
Parse tree example that uses BinaryTree.
WIP - Traversal algorithms for BinaryTree.
Pre-order traversal algorithm implemented for BinaryTree.
Post-order traversal algorithm implemented for BinaryTree.
Implemented the algorithm to parse and evaluate a math expression as example.