F# iOS app that gives INotifyProperty needed error (and other) work with Xamarin.Forms, AddIn 5.02 and latest FSharp (3.1 from github) on Mac

AppDelegate.fs

namespace TestiOS

open System
open MonoTouch.UIKit
open MonoTouch.Foundation

open System
open System.ComponentModel

open Xamarin.Forms
open Xamarin.Forms.Platform.iOS


type ButtonCodePage() as this =
    inherit ContentPage()
    [<Core.DefaultValue>] val mutable actt:Action<int>
    let mutable count = 0
    let button = new Button(Text = String.Format("Tap for click count!"))

    do
        button.Clicked.Add(fun _ ->
                count <- count + 1
                button.Text <- String.Format("{0} click{1}!", count, if count = 1 then "" else "s")
            )

        this.Content <- button

type App() =
    static member GetMainPage() =
        new ButtonCodePage()

[<Register ("AppDelegate")>]
type AppDelegate () =
    inherit UIApplicationDelegate ()

    [<Core.DefaultValue>] val mutable window:UIWindow

    // This method is invoked when the application is ready to run.
    override this.FinishedLaunching (app, options) =
        Forms.Init()
        this.window <- new UIWindow(UIScreen.MainScreen.Bounds)
        this.window.RootViewController <- App.GetMainPage().CreateViewController()
        this.window.MakeKeyAndVisible()
        true

module Main =
    [<EntryPoint>]
    let main args =
        UIApplication.Main (args, null, "AppDelegate")
        0

TestiOS.fsproj

<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
    <ProjectTypeGuids>{6BC8ED88-2882-458C-8E55-DFD12B67127B};{4925A630-B079-445D-BCD4-3A9C94FE9307}</ProjectTypeGuids>
    <ProjectGuid>{B31ECFE9-18F8-462D-A466-17C7D4290617}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <RootNamespace>TestiOS</RootNamespace>
    <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
    <AssemblyName>TestiOS</AssemblyName>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
    <DefineConstants>DEBUG;__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <Tailcalls>false</Tailcalls>
    <ConsolePause>false</ConsolePause>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
    <PlatformTarget>
    </PlatformTarget>
    <MtouchDebug>true</MtouchDebug>
    <MtouchLink>None</MtouchLink>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
    <DefineConstants>__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <PlatformTarget>
    </PlatformTarget>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
    <ConsolePause>false</ConsolePause>
    <Tailcalls>true</Tailcalls>
    <MtouchLink>None</MtouchLink>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\iPhone\Debug</OutputPath>
    <DefineConstants>DEBUG;__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <Tailcalls>false</Tailcalls>
    <ConsolePause>false</ConsolePause>
    <MtouchDebug>true</MtouchDebug>
    <PlatformTarget>
    </PlatformTarget>
    <CodesignKey>iPhone Developer</CodesignKey>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\iPhone\Release</OutputPath>
    <DefineConstants>__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <PlatformTarget>
    </PlatformTarget>
    <CodesignKey>iPhone Developer</CodesignKey>
    <ConsolePause>false</ConsolePause>
    <Tailcalls>true</Tailcalls>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Ad-Hoc|iPhone' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\iPhone\Ad-Hoc</OutputPath>
    <DefineConstants>__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <Tailcalls>true</Tailcalls>
    <ConsolePause>false</ConsolePause>
    <CodesignKey>iPhone Distribution</CodesignKey>
    <PlatformTarget>
    </PlatformTarget>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
    <CodesignProvision>Automatic:AdHoc</CodesignProvision>
    <BuildIpa>true</BuildIpa>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'AppStore|iPhone' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\iPhone\AppStore</OutputPath>
    <DefineConstants>__MOBILE__;__IOS__</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <Tailcalls>true</Tailcalls>
    <ConsolePause>false</ConsolePause>
    <CodesignKey>iPhone Distribution</CodesignKey>
    <PlatformTarget>
    </PlatformTarget>
    <CodesignProvision>Automatic:AppStore</CodesignProvision>
    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="System" />
    <Reference Include="System.Xml" />
    <Reference Include="System.Core" />
    <Reference Include="mscorlib" />
    <Reference Include="FSharp.Core" />
    <Reference Include="monotouch" />
    <Reference Include="Xamarin.Forms.Platform.iOS">
      <HintPath>..\packages\Xamarin.Forms.1.0.6188\lib\MonoTouch10\Xamarin.Forms.Platform.iOS.dll</HintPath>
    </Reference>
    <Reference Include="Xamarin.Forms.Core">
      <HintPath>..\packages\Xamarin.Forms.1.0.6188\lib\MonoTouch10\Xamarin.Forms.Core.dll</HintPath>
    </Reference>
    <Reference Include="Xamarin.Forms.Xaml">
      <HintPath>..\packages\Xamarin.Forms.1.0.6188\lib\MonoTouch10\Xamarin.Forms.Xaml.dll</HintPath>
    </Reference>
  </ItemGroup>
  <ItemGroup>
    <Folder Include="Resources\" />
  </ItemGroup>
  <ItemGroup>
    <None Include="Info.plist" />
    <None Include="packages.config" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="AppDelegate.fs" />
  </ItemGroup>
  <Import Project="$(MSBuildExtensionsPath32)\..\Microsoft SDKs\F#\3.1\Framework\v4.0\Microsoft.FSharp.Targets" />
  <Import Project="../packages/Xamarin.Forms.1.0.6188/build/portable-win+net45+wp80+MonoAndroid10+MonoTouch10/Xamarin.Forms.targets" />
</Project>