Switch to MMI.Native package instead of stub

Update build to use a custom Package directory (`dotnet restore`
installs package assemblies to this location).

nuget.config

@@ -1,5 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
+  <config>
+    <!-- install packages to a custom path -->
+    <add key="repositoryPath" value="Packages"/>
+  </config>
   <packageSources>
     <clear />
     <add key="CI Builds (dotnet-core)" value="https://www.myget.org/F/dotnet-core/api/v3/index.json" />

src/Microsoft.Management.Infrastructure.Native/project.json

@@ -1,20 +0,0 @@
-{
-    "name": "Microsoft.Management.Infrastructure.Native",
-    "version": "1.0.0-*",
-    "description": "Stub to satisfy PowerShell compilation",
-    "authors": [ "garretts", "andschwa" ],
-
-    "frameworks": {
-        "netstandard1.5": {
-            "imports": [ "dnxcore50" ],
-            "compilationOptions": {
-                "warningsAsErrors": true
-            },
-            "dependencies": {
-                "System.Security.SecureString": "1.0.0-*"
-            }
-        },
-        "net451": {
-        }
-    }
-}

src/Microsoft.Management.Infrastructure/project.json

@@ -8,7 +8,7 @@
     },
 
     "dependencies": {
-        "Microsoft.Management.Infrastructure.Native": "1.0.0-*"
+        "Microsoft.Management.Infrastructure.Native": "1.0.0-rc3"
     },
 
     "frameworks": {