Add a camera to take photo

I test can not get the desired results, images has been reversed
Replaced SCTouchDetector to ExampleIOS.
Camera uses SessionPreset directly instead of the SCCameraMode enum.
Fixed photo orientation
Fixed compilation on Mac
Add new functionality

1, add like Instagrm focusing function.
2, add focus animation component.
3, add nitification for Session
4, add notification for capture photo
5, add the delegate to camera
fixed bug for session startRunning and stopRunning
Switch between back and front camera uses SCCameraDevice directly instead of the useFrontCamera property.

I think, to use enumerations for setting will be better?
Just a few points

1、didCapturePhoto need to start animation
fixed bug and add KVO

1、fixed handleRetakeButtonTapped
2、add KVO with FocusMode change
3、fixed KVO with adjustingFocus
Fixed some English.
Added support for SCFlashMode in every sessionPreset
Updated README to add how you can take pictures and configure the camera
Fixed English
Add SCBlurOverlayView show blurred images, UIPinchGestureRecognizer and UIPanGestureRecognizer control SCBlurOverlayView radius size and the location of the blur blur·

Question
1、I don't know how to according to SCBlurOverlayView blur the radius of
the size and the location of the blur blur picture
2、How to add the image filter?
Updated Xamarin Bindings
Fixed output videos not being properly played on QuickTime
add cleanAperture delegate
Merge branch 'master' of https://github.com/rFlex/SCAudioVideoRecorder
The XCode project now have a functional static library target
Added an error check on the finalizeAudioMix.
Fixed recording not working on some devices.
Merge commit 'f160e485a3c256230697d81d3ff38f462bd8b330'

Conflicts:
	SCAudioVideoRecorder.xcodeproj/project.pbxproj