* daklib/queue.py (check_transition): Added in here

* daklib/queue.py (check_transition): Added in here
  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.