Minor enhancements and fixes:

• enhanced blacklisting for preparing maintenances (case-insensitive
  wildcards - see issue #31)
• verification log is created automatically after preparing maintenance
  (see issue #30)
• unicodes are translated into ascii while creating snapshot reports
  (see issue #28)
• locked systems are now excluded while creating snapshot reports by
  default, they can also be integrated using command-line parameters (see
  issue #29)
• decreased verbosity of satprep_snapshot.py
• fixed bug where monitoring host (auth) information are not captured
  correctly (see issue #33)