New receipes for ivs-edit, tools for editing Ideographic Variation Seque...

New receipes for ivs-edit, tools for editing Ideographic Variation Sequence (defined in Unicode Technical Standard #37).
It currently works only with X-Windows (with `libotf' linked) and MacOS X 
(with Yamamoto Mituharu patch) version 24.3 (or later) Emacsen.