Forecast dates are shifting antoinecarme#86

use pandas.DateOffset instead of numpy.timedelta

Updatd these logs

Benchmarking Process antoinecarme#45

Updated this script

'ARX' models are activated by default.

Use Python Logging antoinecarme#10

Update these logs.

Perform signal transformatiion in a uniform way antoinecarme#7

The relative difference transformation is buggy. Disabling for the moment.