worldmods update script

update-worldmods.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+cd data/minetest/world/worldmods
+
+git remote update
+git diff --exit-code HEAD origin/master && exit 0
+
+git pull
+git submodule init
+git submodule sync
+git submodule update
+