背景音乐和过关音效
Improve SoundPlayer Class
tap forg change color
frog changecolor
forgchangecolor
Merge branch 'develop' of https://github.com/wanbin/FORG into develop

Conflicts:
	myForg/src/com/example/myforg/ViewGameTap.java
	myForg/src/com/example/myforg/ViewWelcome.java