final solution for DSB competition

This is final solution based on solution-5 (just tiny changes applied in configs).

UNet specialists, faster processing, weighed loss function, improved validation

Description: https://github.com/neptune-ml/open-solution-data-science-bowl-2018/wiki/UNet-specialists,-faster-processing,-weighed-loss-function,-improved-validation

First attempt to reproduce winning solution

reproduce-v1

Merge branch 'master' into dev-winning_solution

UNet with weighted loss and morphological postprocessing

Description: https://github.com/neptune-ml/open-solution-data-science-bowl-2018/wiki/UNet-with-weighted-loss-and-morphological-postprocessing