Highlights:

New plots (a lot!): imputation, trend, change points, residuals, qq-plot, feature relevance, stl.
New regressors logic in TSDatasets, Transforms and Models
Added jupyter notebook with regressors example
Prediction intervals visualization in plot_forecast
Detrending could be polynomial
Added installation instruction for M1
Fixed TSDataset when plot method does not plot all required segments
VotingEnsemble allows to set weights of estimator as weights of pipelines

Full changelog:

Regressors logic to TSDatasets init (#357)
FutureMixin into some transforms (#361)
Regressors updating in TSDataset transform loops (#374)
Regressors handling in TSDataset make_future and train_test_split (#447)
Prediction intervals visualization in plot_forecast (#538)
Add plot_imputation (#598)
Add plot_time_series_with_change_points function (#534)
Add plot_trend (#565)
Add find_change_points function (#521)
Add option day_number_in_year to DateFlagsTransform (#552)
Add plot_residuals (#539)
Add get_residuals (#597)
Create PerSegmentBaseModel, PerSegmentPredictionIntervalModel (#537)
Create MultiSegmentModel (#551)
Add qq_plot (#604)
Add regressors example notebook (#577)
Create EnsembleMixin (#574)
Add option season_number to DateFlagsTransform (#567)
Create BasePipeline, add prediction intervals to all the pipelines, move parameter n_fold to forecast (#578)
Add stl_plot (#575)
Add plot_features_relevance (#579)
Add community section to README.md (#580)
Create AbstaractPipeline (#573)
Option "auto" to weights parameter of VotingEnsemble, enables to use feature importance as weights of base estimators (https://github.com/tinkoff-ai/etna/pull/587[](https://github.com/tinkoff-ai/etna/releases/edit/1.7.0#changed-1))

Change the way ProphetModel works with regressors (#383)
Change the way SARIMAXModel works with regressors (#380)
Change the way Sklearn models works with regressors (#440)
Change the way FeatureSelectionTransform works with regressors, rename variables replacing the "regressor" to "feature" (#522)
Add table option to ConsoleLogger (#544)
Installation instruction (#526)
Update plot_forecast for multi-forecast mode (#584)
Trainer kwargs for deep models (#540)
Update CONTRIBUTING.md (#536)
Rename _CatBoostModel, _HoltWintersModel, _SklearnModel (#543)
Add logging to TSDataset.make_future, log repr of transform instead of class name (#555)
Rename _SARIMAXModel and _ProphetModel, make SARIMAXModel and ProphetModel inherit from PerSegmentPredictionIntervalModel (#549)
Update get_started section in README (#569)
Make detrending polynomial (#566)
Update documentation about transforms that generate regressors, update examples with them (#572)
Fix that segment is string (#602)
Make LabelEncoderTransform and OneHotEncoderTransform multi-segment (https://github.com/tinkoff-ai/etna/pull/554[](https://github.com/tinkoff-ai/etna/releases/edit/1.7.0#fixed-1))