Update README.md

README.md

 Video tracking
 ==============
 
-Activate video
---------------
+Activating video
+----------------
 
     sudo modprobe bcm2835-V4l2 
     v4l2-ctl --set-fmt-video=pixelformat=UYVY,width=64,height=64
 
-Sometime needs to reboot for the camera to work
+Sometime it needs reboot
 
     i_v4l2_camera -o/img | f_raspinobo_object -o/object -u0 -U70 -v110 -V160 
     
 Activate the head (the target /pinobo.coord is updated by f_raspinobo_object )
     ./run.sh raspinobo/ -T/pinobo.coord
     
-#Display the image
-------------------
+Display the image
+-----------------
 
     o_gtk_image /img