* Updated/added layout drawfiles (Esperanto file further updated from Ursula
  branch version, to indicate characters available when alphabet is changed)
* Added dialling codes for Wales, Wales2, DvorakUK and DvorakUSA
* !IKHG.Source.Chars updated to use quoted characters
* Layout fixes applied to Belgium, Denmark, France, Germany, Greece, Israel,
  LatinAm, Russia, Switzerland and Turkey
* Ctrl-Alt-F1/F2 keyboard selection is performed on a callback

Prototype added to h.unicdata to allow keyconvert to compile.

Dynamic dependencies removed from Makefile; keyconvert removed during clean.

Delete key made special in Japan layout, to enable delete-type code.