and use the logger we requested instead of logging on the root

tzwhere/tzwhere.py

@@ -259,7 +259,7 @@ def read_tzworld(input_kind='json', path=None):
     def read_json(path=None):
         if path is None:
             path = tzwhere.DEFAULT_JSON
-        logging.info('Reading json input file: %s\n' % path)
+        LOGGER.info('Reading json input file: %s\n' % path)
         with open(path, 'r') as f:
             featureCollection = json.load(f)
         return featureCollection
@@ -268,30 +268,30 @@ def read_json(path=None):
     def read_pickle(path=None):
         if path is None:
             path = tzwhere.DEFAULT_PICKLE
-        logging.info('Reading pickle input file: %s\n' % path)
+        LOGGER.info('Reading pickle input file: %s\n' % path)
         with open(path, 'rb') as f:
             featureCollection = pickle.load(f)
         return featureCollection
 
     @staticmethod
     def write_pickle(featureCollection, path=DEFAULT_PICKLE):
-        logging.info('Writing pickle output file: %s\n' % path)
+        LOGGER.info('Writing pickle output file: %s\n' % path)
         with open(path, 'wb') as f:
             pickle.dump(featureCollection, f, protocol=2)
 
     @staticmethod
     def _read_polygons_from_csv(path=None):
         if path is None:
             path = tzwhere.DEFAULT_CSV
-        logging.info('Reading from CSV input file: %s\n' % path)
+        LOGGER.info('Reading from CSV input file: %s\n' % path)
         with open(path, 'r') as f:
             for row in f:
                 row = row.split(',')
                 yield(row[0], [[float(y) for y in x.split(' ')] for x in row[1:]])
 
     @staticmethod
     def write_csv(featureCollection, path=DEFAULT_CSV):
-        logging.info('Writing csv output file: %s\n' % path)
+        LOGGER.info('Writing csv output file: %s\n' % path)
         with open(path, 'w') as f:
             writer = csv.writer(f)
             for (tzname, polygon) in tzwhere._feature_collection_polygons(
@@ -366,7 +366,7 @@ def main():
         import sys
         sys.exit(1)
 
-    logging.info('Application started..')
+    LOGGER.info('Application started..')
     args = docopt.docopt(HELP)
 
     global report_memory