added prooper input for using installed version


git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@76086 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
added ScaledBitmapDemo


git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@76087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775