K means clustering#21

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jiguu wants to merge 4 commits intomasterfrom

Commits on Dec 9, 2014

add random replicated filesystem
cciis2013
committed
fix random fs
cciis2013
committed

Commits on Dec 14, 2014

fix a bug
cciis2013
committed

Commits on Dec 17, 2014

fix a bug #10
cciis2013
committed