[gtksourceview] readme: add section 'About GtkSourceView 4, GtkSourceView 5 and GTK+ 4'

[Sébastien Wilmet <swilmet src gnome org>]

commit 53600a801cfbb61428afb4c4ee3dbcd9a9e8f702
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Feb 12 13:23:18 2017 +0100

    readme: add section 'About GtkSourceView 4, GtkSourceView 5 and GTK+ 4'

 README |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/README b/README
index 0eab72e..42dde5b 100644
--- a/README
+++ b/README
@@ -17,6 +17,15 @@ The GtkSourceView library is free software and is released under the terms of
 the GNU Lesser General Public License.
 
 
+About GtkSourceView 4, GtkSourceView 5 and GTK+ 4
+=================================================
+
+See:
+
+    https://wiki.gnome.org/Projects/GtkSourceView/RoadMap
+    https://wiki.gnome.org/Projects/GtkSourceView/TransitionToGtkSourceView4
+
+
 Installation
 ============