Remove time unit and column from python and make time the first column#18
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heimir-sverrisson wants to merge 2 commits intotwosigma:masterfrom
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Verify that derived time series will have time as the first column, regardless of its position in the source series. Issue twosigma#8 is fixed by using the corrected Scala schema after a call to groupByCycle, as the result has time as first column.
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This PR addresses issue #8 and issue #9.
The time_column and unit arguments have been removed from the TimeSeriesDataFrame python constructor.
If the time column is not the first column it is moved to be the first column of the result. This behavior was already enforced in Scala and is now properly handled in Python including the code that caused issue #8.