Clean up Value.java, move isBitIdentical around
Change LOG_CHK to 22, 4Megs, to help S3 r/w bandwidth

Required copious debugging of KMeanTest, which is exquistely sensitive
to the psuedo-rand generator, and which sets it from outside of KMeans.
Picking a slightly different start value can get an initial bad cluster
choice, and KMeans settles into a broken cluster selection.  For all
other junit tests, it suffices to properly count expected chunks.