Implementation of ShowKit with Xamarin

Steps for Xamarin:

1. Download from Git git clone git@github.com:showkit/Xamarin.git.
2. Open ShowKitApp.sln file using Xamarin Studio.
3. Enter your API_KEY in Constants.cs
4. Enter your PREFIX in Constants.cs (This can be found on your susbcribers page, it is the number before each subscribers username)
5. Right click the Red ShowKit reference and click delete.
6. Extract ShowKit.xamarin.zip.
7. Right click on References, Select Edit References.
8. Click on .NET Assembly.
9. Navigate to ShowKit.xamarin and then double click ShowKit.dll.
10. Click OK.
11. You can now build ShowKit with Xamarin.