make round from hits,make round if strike
check for hit score
fake implement,have one additional round for spare in round 10
before merge cleanRound into currentRound
move hit feature into round
ignored some test in BowlingGame, and check for hit counts
ignored some test rather than comment them
change the visibility of MAX_TRY_IN_ROUND
change current round name to finished round in scoreboard
remove ignore for one test,game over if final round not spare or strike
move additional hit test to scoreboard
score for final round get strike,and additional hit not strike
refactor the game over method,extract normal round finished method
change the test for additional hits