0.9.00 (To be released)
* A bug fix that prevented HEEA data from PITCH_FULL being plotted
  when the PITCH_FULL file starts with a time when PAD_PATCH is active.
* A new ability, to plot line spectra for a given spin, is added.
  This is a major update with a new option "-slice" to plot line spectra
  from PITCH_SPIN, 3D and PITCH_3D files.

0.8.24 (2009-11-01)
* -scp-show option now works for both EFW L2 & L3 potentials
* (bug fix) fill values in EFW data handled correctly in EFW
  L2 & L3 files

0.8.23 (2009-04-24)
* wheel plots from the new version of PITCH_FULL data now work

0.8.20 (2009-03-01)
* (bug fix) background level can now works again in wheel plots
* plots now contain embedded text specifying the plotcf version
  number, username and date/time
* spectrograms can be plotted of the new version of PITCH_FULL

0.8.19 (2009-02-15)
* (bug fix) minor problems with plotting of PITCH_* products fixed
* added a new colour table option (-ctable 2) which corresponds to 
  IDL's red-blue colour table
* when plotting data from a single file and "-nodisplay" is used, 
  a plot will be automatically written to a PNG file where the 
  plot filename is based on the input data filename.

0.8.18 (2009-02-14)
* plot heights now adjustable by users

0.8.16 (2008-12-05)
* (bug fix) plots of PITCH_* data with "-status" option now work for CDF

0.8.15 (2008-11-30)
* (bug fix) components of vectors from CDF files are labelled correctly
  when REPRESENTATION is used instead of LABEL
* major changes made to CEF/CDF reader

0.8.14 (2008-11-27)
* (bug fix) after midnight crossings, timestamps were incorrectly written
  as 24:00, 25:00, etc, rather than 00:00, 01:00 etc

0.8.12 (2008-10-25)
* (bug fix) when PITCH_SPIN data plotted with "-ppa" or "-app" options,
  plots were incorrectly labelled

0.8.11 (2008-10-13)
* (bug fix) corrections & improvements to PITCH_FULL & PITCH_3D plots

0.8.10 (2008-10-10)
* (bug fix) "Ant-parallel" label replaced with "Anti-parallel"

0.8.9 (2008-10-09)
* (bug fix) pitch angles in wheel plots now correct from PEACE pitch
  angle products

0.8.8.6 (2008-10-06)
* (bug fix) some CIS moments products, e.g. C1_CP_CIS-CODIF_HS_H1_MOMENTS,
  were incorrectly identified as spectrograms
* y-axis labelling now works better for products which don't have LABLAXIS
  defined
* (bug fix) some products, e.g. density from C1_CP_CIS-CODIF_HS_H1_MOMENTS,
  sometimes couldn't be plotted
* now handles CEF files generated from CAA CDF files using Qtran

0.8.8.4 (2008-10-04)
* (bug fix) plot titles are now correct for CEF files
* (bug fix) z-component of vectors was plotted as 0 for some EFW CEF files