Missing lopq library in sample `spark-submit` call about lopq

[pumpikano]

There is a disclaimer of sorts about that at the top of the README. One concern is that there are a variety of ways that the package could be provided to the runtime and none of them impact the usage of the LOPQ scripts, so illustrating a single one in all of the example commands seems distracting.

Perhaps something like this is better though?

spark-submit \
        ... # spark configuraton
        train_model.py \
	--data /hdfs/path/to/data \
	--V 16 \
	--M 8 \
	--model_pkl /hdfs/output/path/model.pkl \
	--model_proto /hdfs/output/path/model.lopq

[michaelmior]

Whoops. I guess I missed that section in the docs. That extra line might be helpful (perhaps also include "see above").