PIL: Support systems with Pillow and without

Fixes for systems with Pillow, but leaves a "try: except ImportError" to
support anything that doesn't have a PIL top level import.

Signed-off-by: Alon Levy <alon@pobox.com>

mediagoblin/tests/test_exif.py

@@ -15,7 +15,10 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
-import Image
+try:
+    from PIL import Image
+except ImportError:
+    import Image
 
 from mediagoblin.tools.exif import exif_fix_image_orientation, \
     extract_exif, clean_exif, get_gps_data, get_useful