SceneManager実装
Merge branch 'master' of https://github.com/kyorop/NumakuroSimulation

Conflicts:
	NumakuroSimulation/NumakuroSimulation/IventSelectScene.cpp
	NumakuroSimulation/NumakuroSimulation/Main.cpp
シーンのフレームワーク完成
Merge branch 'master' of https://github.com/kyorop/NumakuroSimulation