incomplete torch installation

[joseph pareti]

I am working on https://github.com/google/FluidNet requiring:

We assume that Torch7 is installed, otherwise follow the instructions here. We use the standard distro with the cuda SDK for cutorch and cunn and cudnn.

So the above instructions take me to http://torch.ch/ which I used to install torch as per http://torch.ch/docs/getting-started.html#_

But presumably the standard distro (= https://github.com/torch/distro ) and cudnn (= https://github.com/soumith/cudnn.torch ) are additional or different components. 

Not knowing anything about torch I am fully in the dark as to which components should be installed. The documentation line I pasted above in italic is quite confusing