Log Message:
Update dcraw to version 7.20  (dcraw.c revision 1.258)

changes:
revision 1.258
date: 2005/05/05 06:35:59
Added "-z" option to fix timestamps.
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revision 1.257
date: 2005/05/03 18:50:30
Refactored to reduce the line count.
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revision 1.256
date: 2005/05/03 04:16:09
Added colorcheck() function, and a color matrix for
the MINOLTA DiMAGE Z2, created with colorcheck().
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revision 1.255
date: 2005/04/29 16:38:16
Added "-j" option, check for corrupt CRW files.
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revision 1.254
date: 2005/04/27 20:10:40
Added the Nikon E880.
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revision 1.253
date: 2005/04/26 00:46:33
Added the Casio EX-P505.
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revision 1.252
date: 2005/04/22 16:03:53
Support little-endian Phase One images.
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revision 1.251
date: 2005/04/19 16:00:41
Added camera white balance for the Nikon D2Hs.
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revision 1.250
date: 2005/04/18 03:18:57
Added camera white balance for the Nikon D2X.