News: SW upgrades; Debian-10 upgrade

• Upgrades:
  • spectra: repaired bug in Scan 2D with ScanList

• Debian-10 upgrade
  • Debian-10 is ready, tests passed
  • Install Tango 9.3, tests passed
  • Install python3-sardana, done
  • python2/python3 compliance, done
  • so far 20 Debian-10 host installed