StandardPaths updates. Added a demo sample for StandardPaths. Made

the Python install prefix be the default install prefix for
StandardPaths.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30597 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/_app_ex.py

@@ -165,6 +165,9 @@ your Mac."""
         if redirect:
             self.RedirectStdio(filename)
 
+        # Use Python's install prefix as the default  
+        wx.StandardPaths.Get().SetInstallPrefix(_sys.prefix)
+
         # This finishes the initialization of wxWindows and then calls
         # the OnInit that should be present in the derived class
         self._BootstrapApp()