v1.3.7 --> v1.3.7-git

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Fix scan from feeder

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
setup.py: PEP8

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
v1.3.7-git --> v1.3.8

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
debian/control: add runtime dependency on libsane
debian/rules: do not run tests if DEB_BUILD_OPTIONS contains nocheck
Merge tag 'v1.3.8' into debian

v1.3.8
Debian release 1.3.8-1