CB-6613 Use WinJS functionality to get base64-encoded content of image instead of File plugin functionality
CB-6612 camera.getPicture now always returns encoded JPEG image
Merge branch 'CB-6612' of https://github.com/MSOpenTech/cordova-plugin-camera
Merge branch 'CB-6613' of https://github.com/MSOpenTech/cordova-plugin-camera