Pyszne singletony
Szkic klasy Duel
Dziala zestawianie pojedynkow, powinno byc thread-safe + pozmieniane niektore struktury
test z całą zgrają graczy [']
poprawione nazwy i struktura folderow
pierwsza wersja API
Merge branch 'master' of https://github.com/jakubswiatkowski/mathduel

Conflicts:
	include/libmathduel/Player.h
	include/libmathduel/PlayerList.h
	include/libmathduel/Random.h
	include/libmathduel/common/Random.h
	include/libmathduel/player.h
	include/libmathduel/player/Player.h
	include/libmathduel/player/PlayerList.h
	include/libmathduel/playerlist.h
	include/libmathduel/random.h
	src/Test.cpp
	src/libmathduel/Player.cpp
	src/libmathduel/PlayerList.cpp
	src/libmathduel/Random.cpp
	src/libmathduel/common/Random.cpp
	src/libmathduel/expression/ExpressionBuilder.cpp
	src/libmathduel/expression/NumberExpression.cpp
	src/libmathduel/player.cpp
	src/libmathduel/player/Player.cpp
	src/libmathduel/player/PlayerList.cpp
	src/libmathduel/playerlist.cpp
	src/libmathduel/random.cpp
Remove doubled files.