Fix using a NuGet 3.0 package source.

NuGet addin needs to reference NuGet.ShimV3.dll and register a shim
controller on startup for the package sources.

Also requires the following binaries:

Newtonsoft.Json.dll
NuGet.Versioning.dll

Issues:

 1. Package source changes also need to be registered with the shim
controller. May have to use a single instance PackageSourceProvider.
 2. Packages left behind in the packages directory, but not referenced
by any project, seem to be re-downloaded each time the Manage Packages
dialog is opened.
 3. Standard default package icon is not displayed.

src/AddIns/Misc/PackageManagement/Project/PackageManagement.csproj

@@ -51,6 +51,9 @@
     <Reference Include="NuGet.Core">
       <HintPath>..\RequiredLibraries\NuGet.Core.dll</HintPath>
     </Reference>
+    <Reference Include="NuGet.ShimV3">
+      <HintPath>..\RequiredLibraries\NuGet.ShimV3.dll</HintPath>
+    </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
     <Reference Include="System" />

src/AddIns/Misc/PackageManagement/Project/Src/PackageManagementServices.cs

@@ -19,6 +19,7 @@
 using System;
 using ICSharpCode.PackageManagement.Scripting;
 using NuGet;
+using NuGet.ShimV3;
 
 namespace ICSharpCode.PackageManagement
 {
@@ -38,6 +39,7 @@ namespace ICSharpCode.PackageManagement
 		static readonly PackageActionRunner packageActionRunner;
 		static readonly PackageRepositoryCache packageRepositoryCache;
 		static readonly UserAgentGeneratorForRepositoryRequests userAgentGenerator;
+		static readonly ShimControllerProvider shimControllerProvider;
 		
 		static PackageManagementServices()
 		{
@@ -56,6 +58,7 @@ namespace ICSharpCode.PackageManagement
 			var consolePackageActionRunner = new ConsolePackageActionRunner(ConsoleHost, packageActionsToRun);
 			packageActionRunner = new PackageActionRunner(consolePackageActionRunner, packageManagementEvents);
 			
+			shimControllerProvider = new ShimControllerProvider();
 			InitializeCredentialProvider();
 		}
 		
@@ -66,6 +69,8 @@ namespace ICSharpCode.PackageManagement
 			var credentialProvider = new SettingsCredentialProvider(new SharpDevelopCredentialProvider(), packageSourceProvider);
 			
 			HttpClient.DefaultCredentialProvider = credentialProvider;
+			
+			shimControllerProvider.Controller.Enable(packageSourceProvider);
 		}
 		
 		public static PackageManagementOptions Options {