add new score function to API
add current score for each move
add score implementation
replace BoardFactory with NodeSwapper
remove nodeId variable
add score observer to nodes
remove score computation when game has ended
keep score in descending order
remove unused import
replace * import with specific imports
Rewrote test for new NodeSwapper implementation
Renamed NodeSwapperTest to ClassicNodeSwapperTest
ClassicNodeSwapperTest now also checks isMarked method to confirm
update order on creation
add tests for OthelloScore
Merge pull request #47 from mharrys/feature-score

Score implementation