v1.1:  First version under RCS
v1.2:  Papco 9 changes implemented.
v1.3:  sp_syncronize_1  renamed sp_synchronize_1
V1.4:  EFI UZ reads arbitrary dates
v1.5:  get_err_no set for papco
v1.6:  efi uz days flip Z for any day, not just 19980504.
v1.61: efi uz days flip based on L1 sun_theta.
v1.62: flip documented in output.
v1.63: mistake in error handling in r_scratch_pad fixed.
v1.64: Decay time in efi uses hyd_data.
v1.65: hydra_plot keyword control in efi panel.
v1.66: read_sdt renames some variables.
v1.67: read Jack's directory to get the mvc data sets.
v1.68: modifications to read_sdt to incorporate 5/29 V56 data.
v1.69: efi_uz_pay can cross day boundries.
v1.70: decay time units.
v1.71: file_ascii facility introduced.
v1.72: hyd_access introduced.
v1.73: file_ascii 3,4,5-column formats.
v1.74: P8 backward-compatibility in file_ascii and hyd_ascii,
       reload in scratch_efi causes currents to reload <- Yikes!!!
v1.75: hyd_access plotter now handles vector quantities.
v1.76: read_papco_mvc don't assume that there were 1556 blocks.
v1.77: hyd_access panel has buttons that all subgroups to be displayed.
v1.78: hyd_access panel has controls for color highlighting.  Bug in 
   autorange fixed.
v1.79: hyd_access panel handles condtion where "change plot type" caused
   crash.  hyd_access descriptor prints component for vector quantities.
v1.80: vector data may be plotted in spherical coordinates.
v1.81: payload to GSM rotation in hyd_access.
v1.82: cat_struct sort of bug fixed in hyd_access panel.  Also, frame is 
    printed in descript string papcoadd
v1.83: hyd_access panel now displays information about data, like units
    and coordinate system.  Also, method (email curator) for requesting 
    modification of this data is also introduced.
v1.84: hydra_ids used to identify footprint of hyd_access panels.
v1.85: didn't release properly, we'll try again.
v1.86: hyd_access prints out the units.
v1.87: hyd_access prints out the units--last version didn't take.
v1.88: don't print ?? when units are undefined.
v1.89: hyd_access print labels if ">" preceeds.
v1.90: efi_v_gsm portion of r_scratch_pad uses hyd_access.
v1.91: hyd_access print labels if ">" preceeds (think I clobbered the last
    one).  components are printed more concisely.
v1.92: hyd_access panel widget made a bit more comfortable, also added draw 
    boxes for label and units.
v1.93: p_hyd_access calls hd_insert fill so that data gaps are rendered.
v1.94: added reconnection events panel.
v1.95: whoops
v1.96: finished up reconnection events panel
v1.97: cleaned up changes on reconnection events panel
v1.98: decay time uses unfiltered e_parl_j_parl from hyd_access.
v1.99: reconnection events prints labels outside plot.
v2.00: new nif transformation: 1_13_00 papco_nif_data_sets.
v2.01: read_papco_nif handles zero-length files.
v2.02: finished up (hopefully) the mvc->nif name conversion.
v2.03: xxc has new times for reconnection events.
v2.04: fixed bug in 2.03 changes.
2.05: fixed bug in reconnection events.
2.06: added separator bars in reconnection events.
2.07: fixed problem with reconnection events.
2.08: all panels have default plot style=19 (psym=-3).
2.09: in reconnection events, seporator crossings are clipped properly.
2.10: kludge added to p_hyd_access that draws a line down to zero.
2.11: kludge 2.10 used for two scales-group quantities.
2.12: hydra/pwi panel fixed.
2.13: kludge 2.10 sets line down to 1e-31 so that /log works.
2.14: bug in p_scratch_pad_line, fce label
2.15: RCS is all screwed up hopefully this fixes!
2.16: Okay, I got it now.
2.17: f_ce
2.18: event_marks
2.19: slightly better interface for event_marks, also overplot conforms to
   papco standard (in that it's not really an overplot.)
2.20: added yoffset and xoffset keywords when realizing hyd_access panel editor
2.21: hyd_access panel prints number at the bottom of the page indicating
  hydra_id for footprint.
2.22: hyd_access panel reports more table info, and keeps group selection.
2.23: p_hyd_access plots label even if it doesn't have ">" prefix.
   "magnitude" printed to indicate component if "!s" is in title string.
2.24: hyd_access panel: added units and multiplier.
2.25: multiplier indicated by units+'/('+multiplier+')'
2.26: fixed bug in p_hyd_access.
2.27: p_hyd_access: hyd_access identifiers are pushed to lower case before
  comparing.
2.28: hyd_access_panel pushes identifier names to lowercase.
2.29: group selector now has six columns.

2.30: hyd_access_panel units selector has "no conversion" as a selectable
  unit.

2.31: plot_access sends Table.interval into hd_insert_fill.
2.32: hyd_access panel plots associated errors.

2.33: introduced hd_scratch_pad panel.

2.34: changes to hd_scratch_pad.

2.35: added component selector to hd_scratch_pad panel.

2.36: hd_scratch_pad encourages (almost enforces) saves.

2.37: hyd_access panel propogates fill through theta operation, and 
   units are changed to 'deg'

2.38: hydra_id now called so that overplots are included in the documentation

v2_39: cvs based now.
v2_40: use swwitch instead of switch for compatibility with IDL 5.3 and up.
v2_41: removed swwitch usage entirely.  Only very old versions of papco 
   needed this.

