implied for non-dak users)

some display tidying

        Add --use-sudo option. Use fcntl locking for writing.
        Move writing into a function (write_transitions).
        Reinvoke self using sudo and --import if necessary.
        Move temporary file creation into a function, use mkstemp.
        Rename to "dak transitions".

   edited file back in place
   (check_transitions): Use proper locking and also use sudo to copy
   the new file in place

generic extension helpers into daklib.extensions

pass the old function as an argument to the new function

functions in dak modules; add upload blocking for dpkg.

  working. Also changed the way prompting/answering goes, to not
  have to import daklib/queue.
  (edit_transitions): When done with a successful edit - also print
  a final overview about defined transitions

       * dak/edit_transitions.py: Renamed from check_transitions.py
       (main): Also rename new_vers/curvers to expected/current
       Basically a nice rewrite, so it now does checks and edit,
       depending on how you call it. Check also removes old transitions,
       if user wants it

  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.

Fix check logic to work the way apt_pkg.VersionCompare wants it. Also parse "not in testing" as reject reason, as wanted by a release team member

Will only move the sql to daklib.database, and the wrapper for the
release team will have the rest on its own.

  Modified so it only cleans up when called with cleanup
  parameter. Which will be called from a seperate script for the
  release managers.

* dak/process_unchecked.py
  (check_transition): Warn on broken transitions file and return,
  not doing anything.
  (check_transition): Moved out of here, into daklib/queue
  (process_it): Call it in daklib.queue, but only if
  changes[architecture] has source included.

Also modify the database result check to not break.