Created lots of stuff for saving scores.
Use Sql database for fun. And it's look cleaner then using files and SharedPreferences class

1) ScoreSQLiteHelper - creates database for storing scores
2) ScoreDao - DAO above ScoreSQLiteHelper
3) TopScoreActivity - shows scores
4) MenuActivity - now responsible for saving scores. Need refactor in future
5) ClassicGame - returns scores to MenuActivity