intro_datalogger


	For the Lumberjack datalogger, different routines set node, restart,
	terminate, return data from, check if alive and write to the log file.
	For most users, the only routine to be aware of is
	logger_get_device_c.  This routine returns data points for a
	given device and property between two dates.

	Related functions:

	logger_get_device_c, logger_check_alive, logger_restart_lists,
	logger_return_data, logger_return_names, logger_setnode,
	logger_shutdown