Fix PIL dependency

setup.py

@@ -3,8 +3,8 @@ from setuptools import setup
 setup(
     name='photo_to_kml',
     version='0.2.0',
-    packages=['photo_to_kml', 'PIL'],
+    packages=['photo_to_kml'],
-    install_requires=['simplekml'],
+    install_requires=['simplekml', 'Pillow'],
     entry_points={'console_scripts':['photo_to_kml = photo_to_kml:main']},
     author='Dan Howe',
     author_email='d.howe@wrl.unsw.edu.au',