Initial commit of SqlTools Service API

ServiceHost/Program.cs

@@ -0,0 +1,20 @@
+using System;
+using Microsoft.PowerShell.EditorServices.Protocol.Server;
+using Microsoft.PowerShell.EditorServices.Session;
+
+namespace Microsoft.SqlTools.ServiceHost
+{        
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var hostDetails = new HostDetails("name", "profileId", new Version(1,0));     
+            var profilePaths = new ProfilePaths("hostProfileId", "baseAllUsersPath", "baseCurrentUserPath");
+            var languageServer = new LanguageServer(hostDetails, profilePaths);
+            
+            languageServer.Start().Wait();
+            
+            languageServer.WaitForExit();
+        }
+    }
+}