[gnome-i18n] en_GB: Add README

[Bastien Nocera <hadess src gnome org>]

commit 817375fc35a408a6ac866be6f1ae1ab705b053be
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Mar 19 12:01:42 2019 +0100

    en_GB: Add README
    
    And point to the en_AU script.

 en_GB/README.md | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/en_GB/README.md b/en_GB/README.md
new file mode 100644
index 00000000..4c7e20ce
--- /dev/null
+++ b/en_GB/README.md
@@ -0,0 +1,8 @@
+# en_GB
+
+See [British English on GNOME Wiki](https://wiki.gnome.org/BritishEnglish) for details.
+
+See also
+--------
+
+- [en_AU translation script](https://github.com/Michael-AU/Cobber/tree/master/Translate)