Added a few #if wxUSE_XXX

Regrouped image format handlers
  Updated the rest accordingly
  Added changes.txt for wxGTK


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2795 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/wfstream.cpp

@@ -15,14 +15,21 @@
 
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+  #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+  #include "wx/defs.h"
+#endif
+
+#if wxUSE_STREAMS && wxUSE_FILE
+
 #include <stdio.h>
 #include <wx/stream.h>
 #include <wx/wfstream.h>
 
-#ifdef __BORLANDC__
-#pragma hdrstop
-#endif
-
 // ----------------------------------------------------------------------------
 // wxFileInputStream
 // ----------------------------------------------------------------------------
@@ -163,3 +170,6 @@ wxFileStream::wxFileStream(const wxString& fileName)
  : wxFileInputStream(fileName), wxFileOutputStream(*wxFileInputStream::m_file)
 {
 }
+
+#endif
+  // wxUSE_STREAMS && wxUSE_FILE