* dak/process_unchecked.py: Import syck module directly, not "from

* dak/process_unchecked.py: Import syck module directly, not "from
  syck import *"
  (check_transition): Do the check for sourceful upload in here
  Also adjust the syck loading commands, rename new_vers to
  expected, curvers to current, to make it more clear what they mean.
* daklib/database.py (get_suite_version): Renamed from
  get_testing_version. Also changed the cache variables name
* The above changes are based on modifications from Anthony.