[gdome]more typedef issues

[Kang Jeong-Hee <Keizi mail co kr>]

libgdome/gdome.h and other header files refer to each other;
e.g. gdome-events.h has no typedef for GdomeEvent from _GdomeEvent.
it's in gdome.h, with other lines of typedef of that fashion. funny.

I expected all the gdome-events stuff in gdome-event.[ch] and events/.
gdome.h should have only #include lines of code, like gtk.h does.
and each gdome-*.h have all the module-specific stuffs.