Added zillions of #if wxUSE_XXX

Removed cmndlgs usage of wxSizer and constraints
  Changed occurences of wxConv_xxx to wxConvXxxx and
    changed some wxConvLibc to wxConvCurrent
  Added Unicode tests to typetests (not finished)
  Compile fix for wxString in Unicode mode - we have
   to use the "experimental" printf then, I guess.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2794 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/file.cpp

@@ -160,7 +160,7 @@ bool wxFile::Exists(const wxChar *name)
 {
     struct stat st;
 #if wxUSE_UNICODE && wxMBFILES
-    wxCharBuffer fname = wxConv_file.cWC2MB(name);
+    wxCharBuffer fname = wxConvFile.cWC2MB(name);
 
     return !access(fname, 0) &&
            !stat(MBSTRINGCAST fname, &st) &&