Add kwargs to from_file that turn on extra fiona features.

Also try to import setup from setuptools to get the 'develop'
feature.

geopandas/geodataframe.py

@@ -16,9 +16,13 @@ class GeoDataFrame(DataFrame):
         self.crs = None
 
     @classmethod
-    def from_file(cls, filename):
+    def from_file(cls, filename, **kwargs):
         """
-        Alternate constructor to create a GeoDataFrame from a file
+        Alternate constructor to create a GeoDataFrame from a file.
+
+        *filename* is either the absolute or relative path to the file to be
+        opened and *kwargs* are keyword args to be passed to the method when
+        opening the file.
 
         Note: This method does not attempt to align rows.
         Properties that are not present in all features of the source
@@ -26,7 +30,8 @@ class GeoDataFrame(DataFrame):
         """
         geoms = []
         columns = defaultdict(lambda: [])
-        with fiona.open(filename) as f:
+        
+        with fiona.open(filename, **kwargs) as f:
             crs = f.crs
             for rec in f:
                 geoms.append(shape(rec['geometry']))

setup.py

@@ -1,4 +1,7 @@
-from distutils.core import setup
+try:
+    from setuptools import setup
+except ImportError:
+    from distutils.core import setup
 
 setup(name='geopandas',
       version='0.1dev',

tests/test_geodataframe.py

@@ -0,0 +1,9 @@
+from geopandas import GeoDataFrame
+
+def test_from_file_():
+    # Data from http://www.nyc.gov/html/dcp/download/bytes/nybb_13a.zip
+    # saved as geopandas/examples/nybb_13a.zip.
+    df = GeoDataFrame.from_file(
+        '/nybb_13a/nybb.shp', vfs='zip://examples/nybb_13a.zip')
+    assert 'geometry' in df
+    assert len(df) == 5