check effect of -np in case of prod. pred.

[UnixJunkie]

My guess: it is ignored for the moment.
The option is only used at training time.

[UnixJunkie]

We should cut the input file into chunks; then run predictors in parallel for each chunk.

[UnixJunkie]

Maybe a chunk-size option also need to be added.

[UnixJunkie]

Once this one is done, check if we can do the same in linwrap.
UnixJunkie/linwrap#51