[Mono-list] Fixes for TextBuffer in gtk GTK#

[Daniel Morgan]

Here is some sample implementations for InsertWithTagsByName() and
CreateTag() for TextBuffer in
gtk in gtk#.  Is it okay?

		// InsertWithTagsByName() should exist in TextBuffer
		void InsertWithTagsByName (TextBuffer buffer,
			TextIter iter, string text, int len,
			string[] TagNames) {

			buffer.Insert(iter, text, len);
			TextIter endIter;
			buffer.GetIterAtOffset(out endIter, len);
			buffer.RemoveAllTags(iter, endIter);
			for (int t = 0; t < TagNames.Length; t++) {
				buffer.ApplyTagByName(tag_name, iter, endIter);
			}
		}

		// CreateTag() should exist in TextBuffer
		void BufferCreateTag (TextBuffer buffer,
				string TagName, object[] TagProperties) {

			TextTagTable textTagTable = buffer.TagTable;
			TextTag textTag = new TextTabg(TagName);

			for(int p = 0; p < TagProperties.Length; p++) {
				// use Base class SetProperty()
				// but will need to convert
				// System.Object to GLib.Value somehow
				// not sure if casting will work
				GLib.Value v = (GLib.Value) TagProperties[p,1];
				textTag.SetProperty (TagProperties[p,0], v);
				textTagTable.Add (textTag);
			}
		}