also move up overlay

geopandas/__init__.py

@@ -9,6 +9,7 @@ from geopandas.geodataframe import GeoDataFrame
 from geopandas.io.file import read_file
 from geopandas.io.sql import read_postgis
 from geopandas.tools import sjoin
+from geopandas.tools import overlay
 
 # make the interactive namespace easier to use
 # for `from geopandas import *` demos.

geopandas/tests/test_overlay.py

@@ -6,8 +6,8 @@ import shutil
 from shapely.geometry import Point
 
 from geopandas import GeoDataFrame, read_file
-from geopandas.tools import overlay
 from geopandas.tests.util import unittest, download_nybb
+from geopandas import overlay
 
 
 class TestDataFrame(unittest.TestCase):