Log Message:
Update ruby-gnome2 to 0.18.0.

== Ruby-GNOME2 0.18.0: 2008-09-30

This release fixes some memory leak bugs and has new
experimental packages.

=== Changes

Ruby/GLib:
  * mkmf-gnome2.rb: add check_cairo. [Kouhei Sutou]
  * fixed memory leaks. [Kouhei Sutou]
    * [#2110165] Gdk::Pixbuf memory leak
  * install glib-enum-types.h. [Andy Spencer]
    * [#2106938] Install glib-enum-types.h

Ruby/GTK2:
  * add GTK+ 2.12 related bindings. [Guillaume Cottenceau]
  * fixed initialize order. [Kouhei Sutou]
    * [#2113491] Incorrect initialize order (compiling with mingw)

Ruby/GooCanvas [NEW][EXPERIMENTAL]:
  * added. [Kouhei Sutou]

Ruby/Pango:
  * fixed memory leaks. [Kouhei Sutou]

Ruby/GtkSourceView2 [NEW][EXPERIMENTAL]:
  * add. [yselkowitz]