Make classes in SD.exe internal.

src/Main/SharpDevelop/Dom/AssemblyReferenceModel.cs

@@ -11,7 +11,7 @@ namespace ICSharpCode.SharpDevelop.Dom
 	/// <summary>
 	/// Model representing list of assembly references.
 	/// </summary>
-	public class AssemblyReferencesModel : IAssemblyReferencesModel
+	class AssemblyReferencesModel : IAssemblyReferencesModel
 	{
 		IAssemblyModel parentAssemblyModel;
 		NullSafeSimpleModelCollection<IAssemblyReferenceModel> assemblyNames;
@@ -50,7 +50,7 @@ namespace ICSharpCode.SharpDevelop.Dom
 	/// <summary>
 	/// Model representing an assembly reference.
 	/// </summary>
-	public class AssemblyReferenceModel : IAssemblyReferenceModel
+	class AssemblyReferenceModel : IAssemblyReferenceModel
 	{
 		IAssemblyModel parentAssemblyModel;
 		DomAssemblyName assemblyName;

src/Main/SharpDevelop/Dom/ClassBrowser/ClassBrowserPad.cs

@@ -19,7 +19,7 @@ using ICSharpCode.SharpDevelop.Workbench;
 
 namespace ICSharpCode.SharpDevelop.Dom.ClassBrowser
 {
-	public class PersistedWorkspace
+	class PersistedWorkspace
 	{
 		public PersistedWorkspace()
 		{

src/Main/SharpDevelop/Project/Build/MSBuildEngine/MSBuildLoggerFilter.cs

@@ -29,7 +29,7 @@ namespace ICSharpCode.SharpDevelop.Project
 	/// A IMSBuildLoggerFilter object that lazy-loads the specified
 	/// IMSBuildLoggerFilter when the specified task is running.
 	/// </returns>
-	public class TaskBoundLoggerFilterDoozer : IDoozer
+	class TaskBoundLoggerFilterDoozer : IDoozer
 	{
 		public bool HandleConditions {
 			get {