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/mstream.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
+
 #include <stdlib.h>
 #include <wx/stream.h>
 #include <wx/mstream.h>
 
-#ifdef __BORLANDC__
-#pragma hdrstop
-#endif
-
 // ----------------------------------------------------------------------------
 // wxMemoryInputStream
 // ----------------------------------------------------------------------------
@@ -60,3 +67,5 @@ wxMemoryOutputStream::wxMemoryOutputStream(char *data, size_t len)
 wxMemoryOutputStream::~wxMemoryOutputStream()
 {
 }
+
+#endif