Remame k-means parameters: K->k, normalize->standardize.
Merge branch 'master' of https://github.com/h2oai/h2o-dev

Conflicts:
	h2o-algos/src/main/java/hex/kmeans/KMeansModel.java
Fix bad commit.
Merge branch 'master' of https://github.com/h2oai/h2o-dev