* gconf/Value.cs: Update to use new string marshalling.
* generator/StringGen.cs, ConstStringGen.cs: Added.
* generator/IGeneratable.cs: Add new method ToNativeReturn.
* generator/CallbackGen.cs: Implement ToNativeReturn. Call
ToNativeReturn for the return statement. Fix a couple of
places where s_ret was being used incorrectly for m_ret.
* generator/ClassGen.cs, EnumGen.cs, ManualGen.cs,
SimpleGen.cs, StructBase.cs: Implement ToNativeReturn.
* generator/SignalHandler.cs: Call ToNativeReturn for the
return statement, instead of CallByName.
* generator/SymbolTable.cs: Use StringGen for gchar, char,
and gunichar, and ConstStringGen for their const variants.
Add a new method wrapper for ToNativeReturn.
(Trim): Add a special-case for const strings so that the
const is not stripped. Otherwise there is no way of
resolving the const case.
* glade/XML.custom: Update to use new string marshalling.
* glib/Marshaller.cs: Added.
* glib/GException.cs, Markup.cs, ObjectManager.cs,
Value.cs: Update to use new string marshalling.
* glib/Object.cs: Remove old g_type_name DllImport
as it is no longer used.
* glue/fileselection.c (gtksharp_file_selection_get_fileop_entry):
Mark this as const return.
* gtk/ColorSelection.custom, FileSelection.custom,
SelectionData.custom: Update to use new string marshalling.
svn path=/trunk/gtk-sharp/; revision=15286
