clarify imagenet download

Author: soumith

imagenet/README.md

@@ -6,8 +6,8 @@ This implements training of popular model architectures, such as ResNet, AlexNet
 
 - Install PyTorch ([pytorch.org](http://pytorch.org))
 - `pip install -r requirements.txt`
-- Download the ImageNet dataset and move validation images to labeled subfolders
-    - To do this, you can use the following script: https://raw.githubusercontent.com/soumith/imagenetloader.torch/master/valprep.sh
+- Download the ImageNet dataset from http://www.image-net.org/
+    - Then, and move validation images to labeled subfolders, using [the following shell script](https://raw.githubusercontent.com/soumith/imagenetloader.torch/master/valprep.sh)
 
 ## Training