Add blending_frame parameter to Stacked Ensembles documentation

Description

adds a blending_frame parameter to Stacked Ensembles. Add this to the User Guide:
blending_frame: Frame used to compute the predictions that serve as the training frame for the metalearner. (Triggers blending mode if provided.)

See original ticket for more information.

Assignee

Angela Bartz

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Reporter

Angela Bartz

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Major
Configure