Add new client/server API for host process

This change introduces a new set of classes that make it much easier to
write a language server or debug adapter and clients for either type of
server.  All client/server logic has been moved to the Protocol library so
that it can be used in other host applications outside of the provided
host process.

Author: daviwil

PowerShellEditorServices.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2013
-VisualStudioVersion = 12.0.40629.0
+# Visual Studio 14
+VisualStudioVersion = 14.0.24720.0
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{F594E7FD-1E72-4E51-A496-B019C2BA3180}"
 EndProject

scripts/AddCopyrightHeaders.ps1

@@ -11,24 +11,30 @@ $copyrightHeaderString =
 //
 '@
 
-$srcPath = Resolve-Path $PSScriptRoot\..\src
-Push-Location $srcPath
+$global:updateCount = 0;
 
-$updateCount = 0;
-$allSourceFiles = Get-ChildItem $srcPath -Recurse -Filter *.cs | ?{ $_.FullName -notmatch "\\obj\\?" }
-
-foreach ($sourceFile in $allSourceFiles)
+function Add-CopyrightHeaders($basePath)
 {
-	$fileContent = (Get-Content $sourceFile.FullName -Raw).TrimStart()
+	Push-Location $basePath
+	$allSourceFiles = Get-ChildItem $basePath -Recurse -Filter *.cs | ?{ $_.FullName -notmatch "\\obj\\?" }
 
-	if ($fileContent.StartsWith($copyrightHeaderString) -eq $false)
+	foreach ($sourceFile in $allSourceFiles)
 	{
-		# Add the copyright header to the file
-		Set-Content $sourceFile.FullName ($copyrightHeaderString + "`r`n`r`n" + $fileContent)
-		Write-Output ("Updated {0}" -f (Resolve-Path $sourceFile.FullName -Relative))
+		$fileContent = (Get-Content $sourceFile.FullName -Raw).TrimStart()
+
+		if ($fileContent.StartsWith($copyrightHeaderString) -eq $false)
+		{
+			# Add the copyright header to the file
+			Set-Content $sourceFile.FullName ($copyrightHeaderString + "`r`n`r`n" + $fileContent)
+			Write-Output ("Updated {0}" -f (Resolve-Path $sourceFile.FullName -Relative))
+			$global:updateCount++
+		}
 	}
+
+	Pop-Location
 }
 
-Write-Output "`r`nDone, $updateCount files updated."
+Add-CopyrightHeaders(Resolve-Path $PSScriptRoot\..\src)
+Add-CopyrightHeaders(Resolve-Path $PSScriptRoot\..\test)
 
-Pop-Location
+Write-Output "`r`nDone, $global:updateCount file(s) updated."

src/PowerShellEditorServices.Host/IMessageProcessor.cs

@@ -59,14 +59,8 @@
     <Reference Include="System.Management.Automation" />
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="DebugAdapter.cs" />
-    <Compile Include="IMessageProcessor.cs" />
-    <Compile Include="LanguageServer.cs" />
-    <Compile Include="LanguageServerSettings.cs" />
-    <Compile Include="MessageLoop.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="StdioConsoleHost.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="App.config" />

src/PowerShellEditorServices.Host/MessageLoop.cs

@@ -3,6 +3,7 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 //
 
+using Microsoft.PowerShell.EditorServices.Protocol.Server;
 using Microsoft.PowerShell.EditorServices.Utility;
 using System;
 using System.Diagnostics;
@@ -67,8 +68,20 @@ static void Main(string[] args)
 
             Logger.Write(LogLevel.Normal, "PowerShell Editor Services Host started!");
 
-            MessageLoop messageLoop = new MessageLoop(runDebugAdapter);
-            messageLoop.Start();
+            ProtocolServer server = null;
+            if (runDebugAdapter)
+            {
+                server = new DebugAdapter();
+            }
+            else
+            {
+                server = new LanguageServer();
+            }
+
+            server.Start();
+            server.WaitForExit();
+
+            Logger.Write(LogLevel.Normal, "PowerShell Editor Services Host exited normally.");
         }
 
         static void CurrentDomain_UnhandledException(