Move logger from __init__.py to utils.py

This will avoid circular dependency when we need to import from utils in
__init__.py.

dbmigrator/__init__.py

@@ -1,15 +1,6 @@
 # -*- coding: utf-8 -*-
 
-import logging
-import sys
-
-logger = logging.getLogger('dbmigrator')
-logger.setLevel(logging.INFO)
-
-handler = logging.StreamHandler(sys.stdout)
-handler.setFormatter(logging.Formatter(
-    '[%(levelname)s] %(name)s (%(filename)s) - %(message)s'))
-logger.addHandler(handler)
+from .utils import logger
 
 
 __all__ = ('logger',)

dbmigrator/utils.py

@@ -15,6 +15,7 @@
 import difflib
 import functools
 import glob
+import logging
 import os
 import pkg_resources
 import re
@@ -25,7 +26,14 @@
 import psycopg2
 from psycopg2.extensions import POLL_OK, POLL_READ, POLL_WRITE
 
-from . import logger
+
+logger = logging.getLogger('dbmigrator')
+logger.setLevel(logging.INFO)
+
+handler = logging.StreamHandler(sys.stdout)
+handler.setFormatter(logging.Formatter(
+    '[%(levelname)s] %(name)s (%(filename)s) - %(message)s'))
+logger.addHandler(handler)
 
 
 # psycopg2 / libpq doesn't respond to SIGINT (ctrl-c):