Moves unpacking task from Worker to Pusher.

Makes more sense and gives us more options to work with control queues from the pusher in the future. Does not seem to affect performance.

django_q/cluster.py

@@ -315,7 +315,13 @@ def pusher(task_queue, event, list_key=Conf.Q_LIST, r=redis_client):
             sleep(10)
             break
         if task:
-            task_queue.put(task[1])
+            # unpack the task
+            try:
+                task = signing.SignedPackage.loads(task[1])
+            except (TypeError, signing.BadSignature) as e:
+                logger.error(e)
+                continue
+            task_queue.put(task)
             logger.debug(_('queueing from {}').format(list_key))
         if event.is_set():
             break
@@ -351,16 +357,10 @@ def worker(task_queue, result_queue, timer, timeout=Conf.TIMEOUT):
     db.close_old_connections()
     task_count = 0
     # Start reading the task queue
-    for pack in iter(task_queue.get, 'STOP'):
+    for task in iter(task_queue.get, 'STOP'):
         result = None
         timer.value = -1  # Idle
         task_count += 1
-        # unpickle the task
-        try:
-            task = signing.SignedPackage.loads(pack)
-        except (TypeError, signing.BadSignature) as e:
-            logger.error(e)
-            continue
         # Get the function from the task
         logger.info(_('{} processing [{}]').format(name, task['name']))
         f = task['func']