More children, More types

Now treedrawer can handle as many children as you want, it isn't limited anymore to binary trees.
Changes are not finished here, treedrawer can handle every type that satisfies the tree.NodeValue interface.
Each node of the tree is now surrounded by a box, which smooths linkage with the rest of the tree.
Several bugs have been fixed.

Better looking trees

Now trees are printed using unicode character, which leads to much better results.

The beginning

Functionalities are basic and code is awful, but it gives an idea of the product.