Update NuGet to version 2.6

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

@@ -37,6 +37,9 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Microsoft.Build" />
+    <Reference Include="Microsoft.Web.XmlTransform">
+      <HintPath>..\RequiredLibraries\Microsoft.Web.XmlTransform.dll</HintPath>
+    </Reference>
     <Reference Include="NuGet.Console.Types">
       <HintPath>..\RequiredLibraries\NuGet.Console.Types.dll</HintPath>
     </Reference>

src/AddIns/Misc/PackageManagement/Project/Src/Design/FakeSettings.cs

@@ -192,5 +192,10 @@ namespace ICSharpCode.PackageManagement.Design
 		{
 			throw new NotImplementedException();
 		}
+		
+		public IList<SettingValue> GetSettingValues(string section, bool isPath)
+		{
+			throw new NotImplementedException();
+		}
 	}
 }

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

@@ -28,7 +28,7 @@ namespace ICSharpCode.PackageManagement
 		}
 		
 		public PackageManagementOptions(Properties properties)
-			: this(properties, Settings.LoadDefaultSettings(null))
+			: this(properties, Settings.LoadDefaultSettings(null, null, null))
 		{
 		}
 		

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

@@ -48,7 +48,7 @@ namespace ICSharpCode.PackageManagement
 		
 		static void InitializeCredentialProvider()
 		{
-			ISettings settings = Settings.LoadDefaultSettings(null);
+			ISettings settings = Settings.LoadDefaultSettings(null, null, null);
 			var packageSourceProvider = new PackageSourceProvider(settings);
 			var credentialProvider = new SettingsCredentialProvider(new SharpDevelopCredentialProvider(), packageSourceProvider);