Simple note to manage personal average and grand average for carom match.

1. The note can manage not only 1:1 match with official handi, but also other matchs
(ex_time attack unlimited handi match, 3 player match etc)

2. the note serves calculation of grand average in several options depend on handi and the number of players.
(ex_ grand aver. for unlimied handi time attack match, grand aver. for 4 player match etc)