Version 1.1.0.3 released

On Windows, version 1.1.0.3 updates several underlying libraries to the most recent stable versions (wxWidgets, libxml, libxslt) and drops MSXML in favour of Xerces-C. On Linux, libraries are already up to date and the release focus has been on better integration with window manager themes. Thanks are due to Justin for sorting out Xerces-C support on Windows.