BCL: updated camera for iOS and camera definitions

camera/Readme.md

@@ -0,0 +1,11 @@
+Sample usage:
+```
+var camera = require("camera");
+
+camera.takePicture({"cameraPosition": camera.CameraPosition.BACK, "flashMode": camera.FlashMode.ON}).then(function (image) {
+    console.log('pic taken - width: ' + image.width + ", height: " + image.height);
+}).fail(function (error) {
+    console.log('pic canceled');
+});
+
+```