start again
	deleted:    mahjong/game_master.hpp
	deleted:    mahjong/hu.hpp
	modified:   mahjong/mahjong.pro
	modified:   mahjong/main.cpp
	new file:   mahjong/tile.h
	deleted:    mahjong/tiles.hpp
	refactored:   mahjong/tile.h
	new file:   mahjong/game_master.h	tested
add testing code
	modified:   mahjong/game_master.h
add and tested check if win
	new file:   mahjong/win.hpp