adjusted TimeElapsed for interruptions

previously, TimeElapsed would simply calculate time from its
instantiation. Now it can read out the info dict which can hold a more
meaningful runtime value.

climin/stops/stops.py

@@ -147,7 +147,7 @@ def __init__(self, sec):
         self.start = time.time()
 
     def __call__(self, info):
-        return time.time() - self.start > self.sec
+        return getattr(info, 'time', time.time()) - self.start > self.sec
 
 
 def All(criterions):