added files via upload

Tweaks/PSHeader/CameraApp/CAMPreviewView.h

@@ -0,0 +1,12 @@
+#import <AVFoundation/AVFoundation.h>
+
+NS_CLASS_AVAILABLE_IOS(8_0)
+@interface CAMPreviewView : UIView
+
+@property (retain, nonatomic) AVCaptureVideoPreviewLayer *videoPreviewLayer;
+
+@property CGFloat dimmingStrength;
+
+- (void)setDimmingStrength:(CGFloat)strength duration:(NSTimeInterval)duration;
+
+@end