1.00:
1.01:
1_02:
1.03:
1.04:
1.05:
1.06: pam changed hydra_findfile.
1.07: test of release script.

1.08: introduced hyd_cdf_varget, which fixes the endian problem on x86.

1.09: introduced hyd_cdf_varget1
1.10: whoops, forgot to check it in.

1.11: Added fuzz-factor to nx,ny in hyd_trigrid for roundoff issues.
1.12: hyd_cdf_varget used for spectra read routines.
1.13: hyd_cdf_varput introduced.
1.14: hyd_cdf_varput checks that the input type matches the cdf file
  type, so that no casting is done by cdf_varput.
1.15: hyd_scatter sets !z.crange
1.16: hyd_cdf_varput fixed for writing zvars by number on sparc.
1.17: introduced hyd_sourcefile(), and other misc changes.
1.18: hyd_sourcefile handles early idl versions.
1.19: introduced hyd_os_dir.pro
1.20: hyd_sourcefile routine input can be x.pro, it just strips the .pro.
1.21: introduced grep.pro, which takes a string and strarr, and prints all
   the elements the string.
1.22: introduced tri_locate, tri_interpolate, and tri_locate_check.
1.23: work-around odd behavior in error_form.pro
1.24: updated read_hydra_spec_l1 to handle 6 sweeps with different energies.

1.25: added include detectors switch to read in level1 spectrogrom read_hydra_spec_l1.
1.26: fixed problems in 1.24, added code to correct the energy_indexes in
  spectra l1 reader, realign code as well.
1.27: no changes.
1.28: high-resolution skew now works with new code that handles 6 sweeps with 
  different energies.
1.29: use lag_correction for spectra_l1 stuff.
1.30: hydra_plot: catch use of psym=10.
1.31: hydra_plotcolor uses getenv('win_px_cm') if set.
1.32: hydra_plot: added keyword errors.
1.33: @papco_cleanup added.
1.34: introduced hyd_intersection
1.35: introduced hyd_tv, which will resample to 300 dpi when in agu mode (setenv, 'hyd_agu=1').  color plotting routines use hyd_tv.
1.36: whoops--forgot to check in hyd_tv...
1.37: fixed bug in hyd_tv.  normal=0 doesn't mean don't use normal!
1.38: added hyd_time_ssm_bug_correct
1.39: fixed whoops
1.40: introduced cdf_nrec.pro
1.41: improved hyd_file_status->get_file_date made more robust
1.42: fixed bug in hydra_plot.
1.43: whooops
1.44: added documentation to fft_freq.pro
1.45: cleaned up itime in read_hydra_spec_l1.pro
1.46: whoops
1.48: hydra_plotcolor averager can average quanities small wrt -1e20.
1.49: cleaned up rcs
1.50: added polar_hydra_public() which returns 1 if in-house software is
  not available.
1.51: added hyd_interactive()
1.52: added reset method to findex.
1.53: findex did have a problem--the test to see if findex_last could
  index the input array was incorrect.  This has been fixed.
1.54: pulled out get_file_date and parse_unix_date from hyd_file_status.
1.55: introduced hyd_progress_bar, which displays a progress bar in a
  non-managed widget.
1.56: fixed bug in hydra_plotcolor, where fill values were not plotted
  in grey.  The fill value was 1e31, and the averager didn't recognize
  the fill value.
1.57: fixed bug in hyd_trid.pro

