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
Enable NuGet package restore
WPF: Fix null reference exception in touch event handlers when controller is not set
Add support for WinPhone
Change output path to Output/XamarinForms
Add nuspec and build scripts (for windows)
Update nuspec
Merge remote-tracking branch 'upstream/develop' into features/XamarinForms
Merge pull request #204 from objorke/features/XamarinForms

Add support for Xamarin.Forms/WinPhone
Update Xamarin build scripts
Update Xamarin.Forms nuspec
Add a new NuGet package for everything built by AppVeyor
Update pdf nuspec file