Create the property files

Create the Packages.props and FixedPackages.props.  These are the files
which will contain our MSBuild mapping from packag name to package
version

build/Targets/FixedPackages.props

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information. -->
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+  <PropertyGroup>
+    <MicrosoftBuildFixedVersion>14.3.0</MicrosoftBuildFixedVersion>
+    <MicrosoftBuildTasksCoreFixedVersion>14.3.0</MicrosoftBuildTasksCoreFixedVersion>
+    <MicrosoftVisualStudioCoreUtilityFixedVersion>14.0.23205</MicrosoftVisualStudioCoreUtilityFixedVersion>
+    <MicrosoftVisualStudioEditorFixedVersion>14.0.23205</MicrosoftVisualStudioEditorFixedVersion>
+    <MicrosoftVisualStudioShell140FixedVersion>14.0.23205</MicrosoftVisualStudioShell140FixedVersion>
+    <MicrosoftVisualStudioTextDataFixedVersion>14.0.23205</MicrosoftVisualStudioTextDataFixedVersion>
+    <MicrosoftVisualStudioTextLogicFixedVersion>14.0.23205</MicrosoftVisualStudioTextLogicFixedVersion>
+    <MicrosoftVisualStudioTextUIFixedVersion>14.0.23205</MicrosoftVisualStudioTextUIFixedVersion>
+    <MicrosoftVisualStudioTextUIWpfFixedVersion>14.0.23205</MicrosoftVisualStudioTextUIWpfFixedVersion>
+    <MicrosoftVisualStudioUtilitiesFixedVersion>14.0.23205</MicrosoftVisualStudioUtilitiesFixedVersion>
+    <MicrosoftVSSDKBuildToolsFixedVersion>14.3.25420</MicrosoftVSSDKBuildToolsFixedVersion>
+    <NewtonsoftJsonFixedVersion>9.0.1</NewtonsoftJsonFixedVersion>
+    <SystemCollectionsImmutableFixedVersion>1.1.36</SystemCollectionsImmutableFixedVersion>
+    <SystemReflectionMetadataFixedVersion>1.0.21</SystemReflectionMetadataFixedVersion>
+  </PropertyGroup>
+
+</Project>