* doc/descriptions/epjitsu.desc, doc/descriptions/fujitsu.desc: version
* doc/descriptions/umax1220u.desc: correct status of 1600U
* doc/descriptions/xerox_mfp.desc: status = new
* backend/epjitsu.[ch], backend/epjitsu-cmd.h: backend v 13, 14 and 15:
- add working page-height control
- add working brightness, contrast and threshold controls
- add disabled threshold curve and geometry controls
- move initialization code to sane_get_devices, for hotplugging
- support S300 on USB power
- support S300 225x200 and 600x600 scans
- support for automatic paper length detection (parm.lines = -1)
- expose hardware buttons/sensors as options for S300
* doc/descriptions/epjitsu.desc: change S300 status to good
doc/descriptions/hp3900.desc, doc/descriptions/hp5590.desc,
doc/descriptions/hpljm1005.desc, doc/descriptions/hs2p.desc:
remove 'new' tag from sane 1.0.19 backends
* doc/descriptions/fujitsu.desc, backend/fujitsu.conf.in:
add fi-5530C2 usb ID
* backend/cardscan.c: correct version number
* backend/epjitsu.conf.in: improved firmware directions
* backend/fujitsu.[ch]: update to backend v 1.0.61