fixing some errors
Merge remote-tracking branch 'origin/master'
fixing some errors
fixing range sensors
fixing range sensors
fixing some errors
fixing some errors
fixing some errors
fixing some errors
fixing some errors
fixing some errors
fixing some errors
fixing some errors
improving the memory usage
improving the memory usage
fixing some errors
fixing some errors
fixing a simple mistake in the code
fixing a simple mistake in the code
fixing a simple mistake in the code