Add SandCastle folder under Build.

Fix formatting of comment in SandCastle build script.

Renci.SshClient/Build/sandcastle/SSH.NET.shfbproj

@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
   <PropertyGroup>
-    <!-- The configuration and platform will be used to determine which assemblies to include from solution and
-				 project documentation sources -->
+    <!--
+      The configuration and platform will be used to determine which assemblies to include from solution and
+      project documentation sources
+    -->
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
     <SchemaVersion>2.0</SchemaVersion>
@@ -51,7 +53,7 @@
     <CppCommentsFixup>False</CppCommentsFixup>
     <CleanIntermediates>True</CleanIntermediates>
   </PropertyGroup>
-  <!-- There are no properties for these groups.  AnyCPU needs to appear in order for Visual Studio to perform
+  <!-- There are no properties for these groups.  AnyCPU needs to appear in order for Visual Studio to perform
 			 the build.  The others are optional common platform types that may appear. -->
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
   </PropertyGroup>

Renci.SshClient/Renci.SshNet.sln

@@ -47,6 +47,11 @@ Project("{911E67C6-3D85-4FCE-B560-20A9C3E3FF48}") = "nuget", "Build\nuget\nuget.
 		AttachLaunchAction = No
 	EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sandcastle", "sandcastle", "{A6C3FFD3-16A5-44D3-8C1F-3613D6DD17D1}"
+	ProjectSection(SolutionItems) = preProject
+		Build\sandcastle\SSH.NET.shfbproj = Build\sandcastle\SSH.NET.shfbproj
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(TeamFoundationVersionControl) = preSolution
 		SccNumberOfProjects = 8
@@ -237,6 +242,7 @@ Global
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{94EE3919-19FA-4D9B-8DA9-249050B15232} = {2D6CAE62-D053-476F-9BDD-2B1F27FA9C5D}
+		{A6C3FFD3-16A5-44D3-8C1F-3613D6DD17D1} = {2D6CAE62-D053-476F-9BDD-2B1F27FA9C5D}
 		{8BE48567-6BDA-43D7-811D-9C30CCB3B7F2} = {94EE3919-19FA-4D9B-8DA9-249050B15232}
 	EndGlobalSection
 EndGlobal