1.4.8
- Add cairoext feature which allow using cairo for drawing via functions in app::cairo::*.
- Add fltk-config feature which allows the use of installed FLTK via invoking fltk-config. This still requires FLTK 1.4.
- Add app::option, set_option functions and Option enum.
- Deprecate Flex::set_size() in favor of Flex::fixed().
- Update FLTK submodule.