ToData now supports multiple formats.

Introduce `ProgrartC` to build a single image to work with other build tools.
Added a `CombinedStorageProvider` to allow aggregate storage providers.

ProgrartC/Properties/launchSettings.json

@@ -0,0 +1,10 @@
+{
+  "profiles": {
+    "ProgrartC": {
+      "commandName": "Project"
+    },
+    "Container (Dockerfile)": {
+      "commandName": "Docker"
+    }
+  }
+}