Mege dev to master (#6)

* Merge master to dev (#4)

* Misc. clean-ups related to removing unneeded PowerShell Language Service code.
* Remove unneeded files and clean up remaining code.
* Enable file change tracking with Workspace and EditorSession.

* Merge ServiceHost xUnit test project into dev. (#5)

* Setup standard src, test folder structure.  Add unit test project.

* Actually stage the deletes.  Update .gitignore

test/ServiceHost.Test/project.json

@@ -0,0 +1,30 @@
+{
+  "version": "1.0.0-*",
+  "buildOptions": {
+    "debugType": "portable"
+  },
+  "dependencies": {
+    "Newtonsoft.Json": "9.0.1",
+    "System.Runtime.Serialization.Primitives": "4.1.1",
+    "xunit": "2.1.0",
+    "dotnet-test-xunit": "1.0.0-rc2-192208-24",
+	"ServiceHost": {
+		"target": "project"
+	  }
+  },
+  "testRunner": "xunit",
+  "frameworks": {
+    "netcoreapp1.0": {
+      "dependencies": {
+        "Microsoft.NETCore.App": {
+          "type": "platform",
+          "version": "1.0.0"
+        }
+      },
+      "imports": [
+        "dotnet5.4",
+        "portable-net451+win8"
+      ]
+    }
+  }
+}