added chainercv2.resnet18 model to supported models

cvmodelz/models/factory.py

@@ -27,7 +27,7 @@ class ModelFactory(abc.ABC):
 
 		chainercv2=(
 			cv2resnet.resnet50,
-			# cv2resnet.resnet50b,
+			cv2resnet.resnet18,
 
 			cv2inceptionv3.inceptionv3,
 		),