Source code was inconsistent on how they were referencing
include files in include/sane. In certain cases, sane/sane.h
and sane/saneopts.h was really including external copies (with
some preprocessor implementations anyways).
Improve speed and reduce noise of most resolutions
Deal with an escape code discovered in the scanner's protocol
Use hardware detailed calibrations for resolutions up to 300
Use improved software detailed calibration for other resolutions
Add more debug information
Drop the 25dpi resolution
Make 200dpi the default (the same as the Windows frontend)
Add code (not used yet) to deal partially with grayscale and
lineart scanning
Use I18N strings where appropriate