Add foundation for the testing from packages, not project references

.gitignore

@@ -16,4 +16,5 @@ node_modules
 *.snk
 .nuget/NuGet.exe
 project.lock.json
-.build
+.build
+.nuget/

build/ci-test.common.props

@@ -0,0 +1,7 @@
+<!-- KoreBuild can discover this file is renamed to universe.props-->
+<Project ToolsVersion="15.0">
+  <PropertyGroup>
+    <!-- VS 2017 aware-packages can use this env variable to swap ProjectReference for PackageReference -->
+    <TestFromPackages>true</TestFromPackages>
+  </PropertyGroup>
+</Project>

makefile.shade

@@ -121,7 +121,12 @@ var buildTarget = "compile"
 
 #verify-all .pull .change-default-build-target-to-verify .build-all
 
-#ci-test .pull .use-local-coherence .sync-commits .remove-src-folders .change-default-build-target-to-verify .build-all
+#ci-test-env
+   @{
+      Environment.SetEnvironmentVariable("CustomUniverseBeforeCommonProps", Path.Combine(Directory.GetCurrentDirectory(), "build", "ci-test.common.props"));
+   }
+
+#ci-test .ci-test-env .pull .use-local-coherence .sync-commits .remove-src-folders .change-default-build-target-to-verify .build-all
 
 #ci-pull
     @{