[ANN] Ruby-GNOME2 version 3.1.3

The gems of the Ruby-GNOME2 project are updated to the version 3.1.3. Those new versions bring:

   * version 3.1.3:

      * improve backward compatibility for Ruby/Pango.

      * see http://ruby-gnome2.osdn.jp/?News_20170427_1

   * version 3.1.2:
      * improvement of GObject-Introspection, GLib2 Gtk3 and others.

      * Atk and Pango gems are now using GObject-Instrospection.

      * incompatible change of GBytes to string conversion.

      * see more information here : http://ruby-gnome2.osdn.jp/?News_20170426_1

= About the ruby-gnome2 project

As a reminder, and for those who didn't know, the Ruby-GNOME2 project is a set of bindings for the GNOME 2.x and 3.x libraries to use from Ruby 2.1, 2.2 and 2.3.

The Ruby-GNOME2 project provides the following gems:

    - atk

    - cairo-gobject

    - clutter

    - clutter-gdk

    - clutter-gstreamer

    - clutter-gtk

    - gdk_pixbuf2

    - gdk3

    - gio2

    - glib2

    - gnumeric

    - gobject-introspection

    - goffice

    - gsf

    - gstreamer

    - gtk2

    - gtk3

    - gtksourceview2

    - gtksourceview3

    - gvlc

    - pango

    - poppler

    - rsvg2

    - vte

    - vte3

    - webkit-gtk

    - webkit2-gtk

    - webkit-gtk2

Since the version 3.0.0, the Ruby-GNOME2 gems are based on the gobject-introspection whenever it is possible.

The platforms supported are Linux, Windows and OS X. In order to install a gem (gtk3 for example) just do :

     gem install gtk3

Sites for the project:

   https://github.com/ruby-gnome2/ruby-gnome2

   http://ruby-gnome2.sourceforge.jp/

= About GTK+ from http://www.gtk.org/

GTK+ is a highly usable, feature rich toolkit for creating graphical user interfaces which boasts cross platform compatibility and an easy to use API. GTK+ it is written in C, but has bindings to many other popular programming languages such as C++, Python and C# among others. GTK+ is licensed under the GNU LGPL 2.1 allowing development of both free and proprietary software with GTK+ without any license fees or royalties.

= About GNOME from http://www.gnome.org/about/

The GNOME project provides two things: The GNOME desktop environment, an intuitive and attractive desktop for users, and the GNOME development platform, an extensive framework for building applications that integrate into the rest of the desktop.