重构前整理
Merge branch 'galin-usaki' of https://github.com/cuter44/JUkagaka.git into galin-usaki

Conflicts:
	BalloonWin.java
	sample-cyau-shell/CyauShell.java
	src/BalloonWin.java
	src/GhostOperatingSystem.java
	src/ghost/cyaushell/CyauShell.java
	src/shell/BalloonWin.java
	src/shell/cyaushell/CyauShell.java