- add all documented request sense codes to sense_handler()
- fix color jpeg (remove unneeded BGR to RGB swapping code)
- add macros for LUT data
* backend/canon_dr.conf.in: add DR-2080C usb ID
* doc/descriptions/canon_dr.desc: backend v10, add DR 3020
- rename read/send_counter to read/send_panel
- enable control panel during init
- add options for all buttons
- call TUR twice in wait_scanner(), even if first succeeds
- disable rif
- enable brightness/contrast/threshold options
* doc/descriptions/canon_dr.desc, doc/sane-canon_dr.man: backend v8
doc/descriptions/canon_dr.desc: backend v5
- remove EOF ejection code
- add SSM and GSM commands
- add dropout, doublefeed, and jpeg compression options
- disable adf backside
- fix adf duplex
- read two extra lines (ignore errors) at end of image
- only send scan command at beginning of batch
- fix bug in hexdump with 0 length string
- DR-7580 support