Translate WOCE-style units to oce units.
woceUnit2oceUnit(woceUnit)string holding a WOCE unit
expression in oce unit form
Other things related to ctd data: [[,ctd-method,
  [[<-,ctd-method, as.ctd,
  cnvName2oceName, ctd-class,
  ctdDecimate, ctdFindProfiles,
  ctdRaw, ctdTrim,
  ctd, handleFlags,ctd-method,
  initialize,ctd-method,
  initializeFlagScheme,ctd-method,
  oceNames2whpNames,
  oceUnits2whpUnits,
  plot,ctd-method, plotProfile,
  plotScan, plotTS,
  read.ctd.itp, read.ctd.odf,
  read.ctd.sbe,
  read.ctd.woce.other,
  read.ctd.woce, read.ctd,
  setFlags,ctd-method,
  subset,ctd-method,
  summary,ctd-method,
  woceNames2oceNames, write.ctd
Other functions that interpret variable names and units from headers: ODFNames2oceNames,
  cnvName2oceName,
  oceNames2whpNames,
  oceUnits2whpUnits,
  unitFromStringRsk,
  unitFromString,
  woceNames2oceNames