migrate all code to Swift. iOS podspec file fix. Include error in error callback

Author: cristianocca

ios/CTPanoramaView.swift

@@ -11,6 +11,7 @@ import SceneKit
 import CoreMotion
 import ImageIO
 
+
 @objc public protocol CTPanoramaCompass {
     func updateUI(rotationAngle: CGFloat, fieldOfViewAngle: CGFloat)
 }

ios/CTPieSliceView.swift

@@ -1,4 +1,8 @@
 //
 //  Use this file to import your target's public headers that you would like to expose to Swift.
 //
-
+#import "React/RCTBridgeModule.h"
+#import "React/RCTViewManager.h"
+#import <React/RCTBridge.h>
+#import <React/RCTUIManager.h>
+#import <React/RCTImageLoader.h>