updated README to have some examples
reogranization
finished reorganization of source
moved tests and added setup.py file, no content.
finished implementing the SAN parser with tests. All 104 tests pass.
refactored some SAN tests. All tests pass.
Finished initial implementation of FEN parsing with tests. All 13 tests pass.
finished initial implementation of PGN parser with tests and tests cases. All 5 PGN tests pass. All 124 project tests pass.