twist_to_manual_control: added launch file

launch/node.launch

+<!-- -->
+<launch>
+  
+  <arg name="node_name"             default="twist_to_manual_control"/>
+
+<!--  <group ns="$(optenv ROBOT car)">-->
+
+    <node pkg ="twist_to_manual_control"
+          type="twist_to_manual_control"
+          name="$(arg node_name)"
+          output="screen">
+      <remap from="~cmd_vel"  to="/cmd_vel"/>
+      <remap from="~steering" to="/manual_control/steering"/>
+      <remap from="~speed"    to="/manual_control/speed"/>
+      
+      <param name="steering_min" value="45"/>
+      <param name="steering_max" value="135"/>
+
+      <param name="angular_sat_min" value="-0.5"/>
+      <param name="angular_sat_max" value="0.5"/>
+      
+      <param name="speed_min" value="-500"/>
+      <param name="speed_max" value="500"/>
+      
+      <param name="linear_sat_min" value="-0.5"/>
+      <param name="linear_sat_max" value="0.5"/>
+    </node>
+
+<!--  </group>-->
+
+</launch>