Fixed config import

Author: jsbroks

backend/webserver/util/dextr.py

@@ -1,6 +1,6 @@
 from dextr import DEXTR
-from ..config import Config
+from config import Config
 
 
 model = DEXTR(nb_classes=1, resnet_layers=101, input_shape=(512, 512), weights_path=Config.DEXTR_FILE,
-              num_input_channels=4, classifier='psp', sigmoid=True)
+              num_input_channels=4, classifier='psp', sigmoid=True)