v0.1.0

• Added rstheme(), an R function for creating new themes!

• Three new themes:

  • Horizon Dark (source)
  • a11y-light and a11y-dark (source)
  • Night Owl (source and night-owlish)

• Added support for automatically choosing light/dark theme by sunrise/sunset
  times using {suncalc} and {ipapi}. (thanks @pat-s, #33)

• Added support for full dialog menu theming via rstheme_dialog_options().
  Full dialog theming is used in Flat White, Horizon Dark and Night Owl.

• Added support for enlarging tabs via rstheme_large_tabs(), on display in
  Flat White, Horizon Dark and Night Owl.