[gnome-commander/GSettings] Dockerfile: Increases Ubuntu version to 15.10

[Uwe Scholz <uwescholz src gnome org>]

commit 85d3f4d2960ee9b14d7a3195384eee2c5fb511f6
Author: Uwe Scholz <uwescholz src gnome org>
Date:   Sun Mar 13 15:13:01 2016 +0100

    Dockerfile: Increases Ubuntu version to 15.10

 Dockerfile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 33cf5c8..83674b2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # This is a Docker image for building gnome-commander
-FROM ubuntu:15.04
+FROM ubuntu:15.10
 MAINTAINER Uwe Scholz <u scholz83 gmx de>
 
 ENV GCMD_PATH /gnome-commander