Read an oceanographic data file, auto-discovering the file type from the
first line of the file.
This function tries to infer the file type from the first line, using
oceMagic(). If it can be discovered, then an
instrument-specific file reading function is called, with the
and with any additional arguments being supplied.
a connection or a character string giving the name of the file to load.
arguments to be handed to whichever instrument-specific reading function is selected, based on the header.