Updated installation instructions for branch openatrium.

Author: dashohoxha

README.org

@@ -13,18 +13,18 @@ Drupal installation profile for B-Translator Client.
 
   + Build a Docker image:
     #+BEGIN_EXAMPLE
-    btr_client/docker-build.sh cfg.sh --git_branch=master
-    less -r nohup-btr_client-master.out
+    btr_client/docker-build.sh cfg.sh --git_branch=openatrium
+    less -r nohup-btr_client-openatrium.out
     #+END_EXAMPLE
-    This will create a docker image, named =btr_client:master= with a
-    minimal ubuntu system and everything that is needed for the normal
-    work of the system.
+    This will create a docker image, named =btr_client:openatrium=
+    with a minimal ubuntu system and everything that is needed for the
+    normal work of the system.
 
   + Create a Docker container like this:
     #+BEGIN_EXAMPLE
     docker images
     docker run -d --name=btr_client --hostname=example.org \
-	       -p 80:80 -p 443:443 btr_client:master
+	       -p 80:80 -p 443:443 btr_client:openatrium
     #+END_EXAMPLE
     Then you can stop and start the container with =docker stop btr_client=
     and =docker start btr_client=.