Klaus Kämpf authored May 03, 2017 and Olaf Meeuwissen committed May 04, 2017

Neither of these scanner have an automated slide transport and fail on
respective SCSI commands.

- Add flags parameter to control if automatic slide transport is available
- Reflect flags in pieusb.conf.in
- rename SLIDE_LAMP_ON to SLIDE_INIT
  it fails on scanners without automatic slide transport, so it has
  nothing to do with the lamp.
- run SLIDE_INIT only FLAG_SLIDE_TRANSPORT is set
- pieusb.conf.in: Add Reflecta CrystalScan 3600