named constants for common time durations (e.g. SECONDS, HOURS, etc.)…

… are part of Bastion.Common, now

lib/Bastion/Chronology.py

@@ -4,15 +4,10 @@
 import string
 import datetime
 import logging
+from .Common import *
 
 logger = logging.getLogger(__name__)
 
-SECOND  = datetime.timedelta(seconds = 1)
-SECONDS = SECOND
-MINUTE  = datetime.timedelta(minutes = 1)
-MINUTES = MINUTE
-HOUR    = datetime.timedelta(hours = 1)
-HOURS   = HOUR
 
 def quantim(then = None, **kwargs):
 	"""