Wx::Demo 0.24

• Some minor but important updates to handle methods no longer available in wxWidgets 3.2+.
• Upon startup, version number information is shown in the log window.

Wx::Demo 0.23

• Fork from wxPerl/wxDemo.
• Remove wxDOC_MDI from wxDocView.pm. It is no longer used and doesn't exist in wxPerl.
• Remove setting locale from wxperl-demo. It crashes on some platforms.