create cho class
死亡処理追加。爆発エフェクト修正。
update cho scene
Merge branch 'feature/kawabata' into develop

Conflicts:
	Classes/PlayerShip.h
	proj.ios/.DS_Store
	proj.ios/cocos2dx-space-game.xcodeproj/project.pbxproj
fixed conflict
Merge branch feature/kawabata
fixed conflict
fixed conflict
Merge branch 'develop' into feature/shibuya
渋谷グループを追加