Add NSCameraUsageDescription doc and update sample plists

Author: Bryant Luk

Release/README.md

@@ -95,6 +95,7 @@ pod 'CardIO'
 1.  Add [card.io's open source license acknowledgments](acknowledgments.md) to
 [your app's acknowledgments](http://stackoverflow.com/questions/3966116/where-to-put-open-source-credit-information-for-an-iphone-app).
 2.  Refer to the header files for more usage options and information.
+3.  You should add the key [`NSCameraUsageDescription`](https://developer.apple.com/library/prerelease/content/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW24) to your app's `Info.plist` and set the value to be a string describing why your app needs to use the camera (e.g. "To scan credit cards."). This string will be displayed when the app initially requests permission to access the camera.
 
 ### Sample code
 

Release/SampleApp-Swift/SampleApp-Swift/Info.plist

@@ -43,5 +43,7 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
+  <key>NSCameraUsageDescription</key>
+  <string>To scan credit cards.</string>
 </dict>
 </plist>

Release/SampleApp/ScanExample/ScanExample-Info.plist

@@ -43,5 +43,7 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
+  <key>NSCameraUsageDescription</key>
+  <string>To scan credit cards.</string>
 </dict>
 </plist>

icc-Framework-Info.plist

@@ -34,6 +34,8 @@
 	<string></string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>To Scan cards</string>
 	<key>NSMainNibFile</key>
 	<string>MainWindow</string>
 	<key>NSMainNibFile~ipad</key>