Fixes #7

* added a synchronous cluster simulation

* added a test for the sync function

* moved signing into its own module

* refactored imports to solve circular import problems stemming from the task module pretending to be a cluster

* added documentation for the new sync option

django_q/__init__.py

@@ -1,3 +1,9 @@
+import os
+import sys
+
+myPath = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, myPath)
+
 from .tasks import async, schedule, result, fetch
 from .models import Task, Schedule