Add save_map.launch

launch/include/save_map.launch

+<?xml version="1.0"?>
+<!-- -->
+<launch>
+
+  <arg name="ns"            default="robot"/>
+  <arg name="path"          default="$(find iri_maps)/maps"/>
+  <arg name="map_name"      default="my_map"/>
+  <arg name="map_topic"     default="$(arg ns)/map"/>
+  <arg name="output"        default="screen" />
+  <arg name="launch_prefix" default="" />
+  
+  <group ns="$(arg ns)">
+    
+    <node name="map_saver" 
+          pkg ="map_server" 
+          type="map_saver"
+          args="-f $(arg path)/$(arg map_name)"
+          output="$(arg output)"
+          launch-prefix="$(arg launch_prefix)">
+      <remap from="~map"        to="$(arg map_topic)"/>
+    </node>
+  
+  </group>
+
+</launch>