Delete the log group when the function is deleted. Fixes #28

@@ -152,6 +152,7 @@ class Context(object):
     def delete(self):
         for event_source in self.event_sources:
             event_source.remove(self.function)
+        self.function.log.delete()
         self.function.delete()
         time.sleep(5)
         if self.role:

@@ -13,10 +13,12 @@
 
 import logging
 
-LOG = logging.getLogger(__name__)
+from botocore.exceptions import ClientError
 
 import kappa.aws
 
+LOG = logging.getLogger(__name__)
+
 
 class Log(object):
 
@@ -61,3 +63,11 @@ class Log(object):
             logStreamName=latest_stream['logStreamName'])
         LOG.debug(response)
         return response['events']
+
+    def delete(self):
+        try:
+            response = self._log_svc.delete_log_group(
+                logGroupName=self.log_group_name)
+            LOG.debug(response)
+        except ClientError:
+            LOG.debug('unable to delete log group')