Xamarin Forms for iOS
Move ExportRendererAttribute to PlotViewRenderer
Reference OxyPlot.XamarinForms and OxyPlot.XamarinIOS in SimpleDemo.iOS
iOS: fix rectangle conversion bug
iOS: Add constructor overloads for PlotView
Xamarin.Forms: update renderer and example
Xamarin.Forms: add support for Android
Merge remote-tracking branch 'upstream/develop' into features/XamarinForms
Merge pull request #203 from objorke/features/XamarinForms

Add support for Xamarin Forms