Log Message:
update to 1.4.

Changes:
* Codebase ported to SDL. X11/OSS ports have been discontinued.
* Added OpenGL rendering support. (not enabled in pkgsrc)
* Added more refined in-game GUI.
* Added event remapping. Emulation keys can now be remapped to the
  keyboard or up to 4 joysticks.
* Added native Stelladaptor support. Joysticks, paddles, and driving
  controllers have been tested.
* Digital sound support has been greatly improved.
* Added support for switchable palettes.
* Added support for UA Limited style bankswitching (Funky Fish and Pleiades).
* Switched to using high compatibility M6502 mode by default. This
  means old state saves from previous Stella versions will no longer
  work.