What's New 646g4c

New features:
1. Add the sound effects
2. Add the Guide
3. Add the Day-selection function
4. Add the page locking-review function
5. Add the navigation matte

Issue Fixed:
1. fixed the screen rotation problem
2. fixed the flip action of cover
3. fixed the paging gestures problem
4. adjust the spacing after importing the picture
5. fixed the split keyboard problem