Merge remote-tracking branch 'refs/remotes/tryggvib/532-exif-creation-date'

Conflicts:
	mediagoblin/config_spec.ini
	mediagoblin/templates/mediagoblin/user_pages/media.html

mediagoblin/media_types/image/models.py

@@ -44,6 +44,23 @@ class ImageData(Base):
     gps_altitude = Column(Float)
     gps_direction = Column(Float)
 
+    def get_original_date(self):
+        """
+        Get the original date and time from the EXIF information. Returns
+        either a datetime object or None (if anything goes wrong)
+        """
+
+        import datetime
+        try:
+            # Try wrapped around all since exif_all might be none,
+            # EXIF DateTimeOriginal or printable might not exist, or
+            # strptime might not be able to parse date correctly
+            exif_date = self.exif_all['EXIF DateTimeOriginal']['printable']
+            original_date = datetime.datetime.strptime(exif_date,
+                                                       '%Y:%m:%d %H:%M:%S')
+            return original_date
+        except:
+            return None
 
 DATA_MODEL = ImageData
 MODELS = [ImageData]