Update workflow example to reference kddcup.data_10_percent filename
Create a Spec from a Summary object if it's not specified by default
Mark Spec field in the Summary object as transient
Make the --compress option work with the DefaultCodec for local runs
Update the kmeans command to use the --num-threads option and make the choice of K clearer from the data
Update KMeansSketchCommand.java

Typo in `--points-per-iteration`: "The The"
Add better naming and log messages for the ksketch runs
Formula prototyping for parallelization
Classifier refactoring/re-organization, with a tiny bit of reduce-side scaffolding for
classifier-parallel.
Add in preliminary support for model output data structures