Add ade20k and cityscapes

cityscapes-id2label.json

@@ -0,0 +1 @@
+{"0": "road", "1": "sidewalk", "2": "building", "3": "wall", "4": "fence", "5": "pole", "6": "traffic light", "7": "traffic sign", "8": "vegetation", "9": "terrain", "10": "sky", "11": "person", "12": "rider", "13": "car", "14": "truck", "15": "bus", "16": "train", "17": "motorcycle", "18": "bicycle"}