efficient line check
class added: Test
class added: FourLine (struct)
class added: Player
efficient line check
class added: Test
class added: FourLine (struct)
class added: Player
efficient line check
class added: Test
class added: FourLine (struct)
class added: Player
efficient line check
class added: Test
class added: FourLine (struct)
class added: Player
Revert "efficient line check class added: Test class added: FourLine (struct) class added: Player"

This reverts commit fe08ef909422f22d90ab364a3fc2e3f673b7c1c5.