Cleanup, file operator changes#5

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devtagare wants to merge 11 commits intomasterfrom

Commits on Feb 1, 2016

Concurrency for fileInputOp
pm-devendra-tagare
committed
removed unifier for alert,SumKeyVal and explicit commit call in fileOperator
pm-devendra-tagare
committed

Commits on Feb 2, 2016

keep track of comitted files window-wise, dont emit totals if there is no change
pm-devendra-tagare
committed
removed unused imports
pm-devendra-tagare
committed

Commits on Feb 3, 2016

file moving, unifier with state for total counts
pm-devendra-tagare
committed

Commits on Feb 4, 2016

unifier
pm-devendra-tagare
committed