Fixed bug in StringUtils not working on numbers formated as ".213" that are missing a leading zero.

Adding code from paper Exact Acceleration of K-Means++ and K-Means‖

Adding OWA algorithm initial implementation

Outer loop of NewGLMET is usually dense enough or rare enough that full pass is fine using faster boolean arrays, and we can maker the use of the hash map occur for just the smaller portion of samples in the iner loop.

Only sort for column major data where it will make a big difference & improvement.

Adding ProjectionTransform for applying/using a specific projection matrix with bias offset. Should make PCA extend in the future

Adding new FixedDataTransform as a functional interface to make life easier to apply a simple/quick alteration to a data set.

Bug fix didn't call finishAdding for DataStore

Adding default implementations for extended interface methods

Adding fast path for common case of inserting from lowest index to highest for sparse vector

Small change to make randomSplit work better for sparse column stored data

forgot a clone

Adding clone method to interface that should have it

Making the combineAllBut method a little more flexible to ignoe the "but" part and just combine everything

Bug fix forget to set sparse flag passed in