Exploratory Data Analysis EDA

t6 comes with and handfull set of EDA apis. Today the implementation is still in progress but give the opportunity to begin Exploring timeseries datapoints from a specific flow.

Non graphical output

## Summary

Head and Tail

Those 2 common method of Data Exploration are self-explanatory. They just returns the top n bottom or top Datapoints from database.

## (to come later) List Distinct Facts

## (to come later) List Distinct Categories

Graphical output

Frequency shape distribution

This graph is not yet accurate, but it aims to illustrate the intent. :-) any support would be appreciated. :-)

Loess

Boxplot

TimeSeries decomposition

(to come later) Supporting t6 or even better helping implement features is very welcome. Please refers to CONTRIBUTING.md in case you would like to help :-)