HW4: time the GetCommandLineArguments() func

Signed-off-by: unknown <zkk12345@gmail.com>
HW4: add documentation to EvaluateMarkovModel()

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HW4: switch the columns/rows in confusionMatrix (EvaluateMarkovModel() return value)
	ease the file writing


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HW4: write the confusion matrix into "conf_matrix.txt"
	def WriteConfusionMatrix(confusionMatrix):

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HW4: minor changes