rename gen_etl_graph* codes to sh/* dir

sh/gen_etl_graph_housenumber.sh

@@ -0,0 +1,20 @@
+
+
+DOT=housenumber.dot
+
+echo "digraph G
+{    
+rankdir=LR;
+" > $DOT
+
+cat ./layers/housenumber/mapping.yaml              | grep    "# etldoc:" |  sed 's/# etldoc://g'  >>$DOT
+cat ./layers/housenumber/housenumber_centroid.sql  | grep "\-\- etldoc:" |  sed 's/-- etldoc://g' >>$DOT
+cat ./layers/housenumber/layer.sql                 | grep "\-\- etldoc:" |  sed 's/-- etldoc://g' >>$DOT 
+
+echo "
+}
+" >> $DOT
+
+cat $DOT
+
+dot -Tpng $DOT > layer_housenumber_etl.png