Log Message:
Update to 1.0.20, set LICENSE.

New with 1.0.20, released 2009-05-03:

* New backends: canon_dr (Canon DR-series), coolscan3 (Nikon LS & Coolscan),
  rts8891 (Umax & HP 44xx), xerox_mfp (Samsung/Xerox/Dell MFPs)
* Many backends updated.
* 75 more scanner models supported.
* New build system (thanks Chris and Olaf).
* Avahi support (thanks Julien).
* More network scanners supported
* Epson backend deprecated, use epson2
* Coolscan2 backend deprecated, use coolscan3
* Internal SCSI, USB, threading, TCP & UDP code updates.
* Updated HAL and udev support.
* Improved saned configuration.
* Scanimage updates.
* Updated translations.
* Documentation updates.
* Bugfixes.