Image Multiplier is the easiest way to create all of the PNG files you need for a complex Xamarin Solution including all of the sizes needed by Android and iOS. It converts SVG files to PNG files according to a set of specifications. You can install it from the Gallery in the Add-in Manager in Xamarin Studio.
Xamarin has changed the root folder name of the Android project in Xamarin Studio. The new folder is now \Droid in Xamarin Studio.