Updated large icons for "native" toolbar on OSX (helps #89).
Updated binaries with a patched version of wxlua (helps #89).

The patch is needed to fix live coding issue with wxlua applications. Also
uses a more recent version of wxwidgets, that fixes menu hint on OSX.
Updated function call indicator to use round box with wxwidgets upgrade (helps #89).
Removed checks for Windows in font setup; now uses default font.
Increased default font size for OSX; set 'Monaco' as default font (helps #89).