#77: reorganized arithmetic test
#77: bug with arithmetic testing in TestBigDecimalBoard
#77: need to write equals and hashcode for abstract board
fixing merge conflict
#77: committing for backup
Merge branch 'dev' into arithmeticTesting
#95: committing for backup
#95: added in unit testing package
Merge branch 'dev' into mobility
#95: committing for backup
#95: committing for backup
Merge branch 'dev' into mobility
Merge branch 'dev' into mobility
#95: beginning TDD for mobility board and mobility piece
closes #95
#105: committing for backup
#105: committing for backup
#105: committing for backup
#105: committing for backup
#105: Modified access modifier of BasicBoardPiece to protected