Create a list of ODF header metadata
ODFListFromHeader(header)Vector of character strings, holding the header
A list holding the metadata, with item names matching
those in the ODF header, except that duplicates are transformed
through the use of unduplicateNames.
Other things related to odf data: ODF2oce,
  ODFNames2oceNames,
  [[,odf-method,
  [[<-,odf-method, odf-class,
  plot,odf-method,
  read.ctd.odf, read.odf,
  subset,odf-method,
  summary,odf-method