Started writing tests for binary tree
Added tests
Moved test_bst.py
Add tests for depth and balance methods
Add stubs
Added init and insert methods
Added tests for contains
Added size method
Add addional tests for depth
Add depth, balance methods; add main block with best/worst case
Add visualization code
Minor cleanup
Add assertion to depth test to check depth after one insert
Update README
More cleanup
Merge pull request #16 from MikeDelaney/bst

Bst