Added some getters to the unresolved type system.

I need to generate id strings using the unresolved type system and these are required for that.

Author: Mike Krüger

ICSharpCode.NRefactory/TypeSystem/IMethod.cs

@@ -47,6 +47,8 @@ public interface IUnresolvedMethod : IUnresolvedParameterizedMember
 		/// </summary>
 		bool IsAsync { get; }
 
+		bool IsExtensionMethod { get; }
+
 		[Obsolete("Use IsPartial && !HasBody instead")]
 		bool IsPartialMethodDeclaration { get; }
 

ICSharpCode.NRefactory/TypeSystem/Implementation/TypeParameterReference.cs

@@ -49,6 +49,12 @@ public static TypeParameterReference Create(SymbolKind ownerType, int index)
 		readonly SymbolKind ownerType;
 		readonly int index;
 
+		public SymbolKind OwnerType {
+			get {
+				return ownerType;
+			}
+		}
+
 		public int Index {
 			get {
 				return index;