Add swipe, tap and long press gesture to capture video frame more efficiently

1. Greatly improved video and captured image quality
2. Support latest iOS 13
3. Extract hi-resolution still image from 4K HD video files

1. Improve the UI
2. Some bugs fixed

1. Support iOS8
2. New photo editor
3. Some bugs fixed

1. Support iOS7
2. Some bugs fixed

1. Improved icon design
2. Fixed some bugs