Strange Cabin_Version 1.01

New features: 

1. Add several sounds effects. 
2. Implement a way for to scroll down/up the camera.
3. Implement a way to skip the typewritter and dialog

Bug fix: 

1. Fix the bug that gun weapon fire in wrong direction after reactivate.
2. Fix the bug of repeated entering AttackState.

新功能：

1. 加入部分音效
2. 给予玩家拉近/远相机的功能
3. 实现跳过打字机或对话框的效果

Bug修复：

1. 修复玩家移动时一直按住鼠标，会同时射出2发角度很接近的子弹
2. 修复玩家切换武器后的第一发子弹方向出现错误