Update Readme to not contain obsolete instructions

README.txt

@@ -1,15 +1,3 @@
-== Postprocessing Logfile example ==
-Download this file:
-http://code.google.com/p/tu-darmstadt-ros-pkg/downloads/detail?name=Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag&can=2&q=
-
-Open a new terminal window, type:
-rosmake hector_slam
-
-Launch the tutorial launch file provided in the hector_slam_launch package:
-roslaunch hector_slam_launch tutorial.launch
-
-Open another terminal, enter the directory of the .bag file and type:
-rosbag play Team_Hector_MappingBox_RoboCup_2011_Rescue_Arena.bag --clock
-
-You should now be able see the mapping process in rviz.
+# hector_slam
 
+See the ROS Wiki for documentation: http://wiki.ros.org/hector_slam