added support for rpm packaging and basic support for deb

lib/huey/exceptions.py

@@ -0,0 +1,26 @@
+class QueueException(Exception):
+    pass
+
+class QueueWriteException(QueueException):
+    pass
+
+class QueueReadException(QueueException):
+    pass
+
+class QueueRemoveException(QueueException):
+    pass
+
+class DataStoreGetException(QueueException):
+    pass
+
+class DataStorePutException(QueueException):
+    pass
+
+class DataStoreTimeout(QueueException):
+    pass
+
+class ScheduleAddException(QueueException):
+    pass
+
+class ScheduleReadException(QueueException):
+    pass