Add ping subcommand to batman script

src/freedombone

   echo '    status)' >> $batman_script
   echo '        batctl o' >> $batman_script
   echo '        ;;' >> $batman_script
+  echo '    ping)' >> $batman_script
+  echo '        batctl ping $2' >> $batman_script
+  echo '        ;;' >> $batman_script
   echo '    ls|list)' >> $batman_script
   echo '        avahi-browse -at' >> $batman_script
   echo '        ;;' >> $batman_script
   echo '    *)' >> $batman_script
   echo '    echo "error: invalid parameter $1"' >> $batman_script
-  echo '    echo "usage: $0 {start|stop|restart|status|list|ls}"' >> $batman_script
+  echo '    echo "usage: $0 {start|stop|restart|status|ping|list|ls}"' >> $batman_script
   echo '    exit 2' >> $batman_script
   echo '    ;;' >> $batman_script
   echo 'esac' >> $batman_script

src/freedombone-client

   echo '    status)' >> $batman_script
   echo '        batctl o' >> $batman_script
   echo '        ;;' >> $batman_script
+  echo '    ping)' >> $batman_script
+  echo '        batctl ping $2' >> $batman_script
+  echo '        ;;' >> $batman_script
   echo '    ls|list)' >> $batman_script
   echo '        avahi-browse -at' >> $batman_script
   echo '        ;;' >> $batman_script
   echo '    *)' >> $batman_script
   echo '    echo "error: invalid parameter $1"' >> $batman_script
-  echo '    echo "usage: $0 {start|stop|restart|status|ls|list}"' >> $batman_script
+  echo '    echo "usage: $0 {start|stop|restart|status|ping|ls|list}"' >> $batman_script
   echo '    exit 2' >> $batman_script
   echo '    ;;' >> $batman_script
   echo 'esac' >> $batman_script