Greenguard

* Fix ``mkdir`` when exporting to ``csv`` file the benchmark results.
* Intermediate steps for the pipelines with demo notebooks for each pipeline.

Resolved Issues

* Issue 50: Expose partial outputs and executions in the ``GreenGuardPipeline``.

With this release we include:

* `run_benchmark`: A function within the module `benchmark` that allows the user to evaluate
templates against problems with different window size and resample rules.
* `summarize_results`: A function that given a `csv` file generates a `xlsx` file with a summary
tab and a deatailed tab with the results from `run_benchmark`.

* Fix dependency errors

* Added benchmarking module.

Internal Imrpovements

* Added github actions.

Resolved Issues

* Issue 27: Cache Splits pre-processed data on disk

With this release we give the possibility to the user to specify more than one template when
creating a GreenGuardPipeline. When the `tune` method of this is called, an instance of BTBSession
is returned and it is in charge of selecting the templates and tuning their hyperparameters until
achieving the best pipeline.

Internal Improvements

* Resample by filename inside the `CSVLoader` to avoid oversampling of data that will not be used.
* Select targets now allows them to be equal.
* Fixed the csv filename format.
* Upgraded to BTB.

Bug Fixes

* Issue 33: Wrong default datetime format

Resolved Issues

* Issue 35: Select targets is too strict
* Issue 36: resample by filename inside csvloader
* Issue 39: Upgrade BTB
* Issue 41: Fix CSV filename format