Image Area Perc85 Sigmoid

Slice:	images_new_runtime_doc_features
Index:	127
Name:	ImageAreaPerc85Sigmoid
Group:
Description:	Sigmoid of 85th percentile of image area in document (corresponds to metric, details in https://wiki.yandex-team.ru/users/nerevar/imganalytics/imgscoringoffline/)
Tags:	TG_DOC TG_STATIC TG_FRESHNESS_FROZEN_POOL
Authors:
Responsibles:	fedorenko