Fixing project names to fix VS bugs

For whatever reason, Visual Studio throws a fit if a referenced project has a name
and the folder name (which is used to reference the project) is different than that name.
To solve this issue, I've renamed all the projects and folders to match their project
names as stated in the project.json.

src/Microsoft.SqlTools.ServiceLayer/Hosting/Protocol/IMessageSender.cs

@@ -0,0 +1,23 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System.Threading.Tasks;
+using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.Hosting.Protocol
+{
+    internal interface IMessageSender
+    {
+        Task SendEvent<TParams>(
+            EventType<TParams> eventType,
+            TParams eventParams);
+
+        Task<TResult> SendRequest<TParams, TResult>(
+            RequestType<TParams, TResult> requestType,
+            TParams requestParams,
+            bool waitForResponse);
+    }
+}
+