wip introduce gamestate
changed from turnkeeper to turncalculator
ImmutableNode equals now with occopyingPlayerId
Made hasCoordinates public with documentation
Merge remote-tracking branch 'origin/Change-equals-of-ImmutableNode' into introduce-immutable-game-state-in-model
Merge branch 'introduce-immutable-game-state-in-model' of https://github.com/ragnhildkarlsson/Othello into immutable-game-state-approach-api
changed to work with coordinates
aaded boardcompare and get gameModel
Merge branch 'introduce-immutable-game-state-in-model' of https://github.com/ragnhildkarlsson/Othello into immutable-game-state-approach-api