Adding the distribution units to the predictions of local models

Adding distribution units and add_median in local model predict

Adding the median as new prediction type in models

Fixing bug: centroids failed for clusters with summary fields

Changing max_bins attribute in local model to private

Bug fixing: local ensemble for JSON files and stored ensemble structures

Fixing some test changes to adapt to backend changes in clusters and …

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Bug fixing: source uploading failed for python older than 2.7.9

Deleting leftover and enlarging tests timeouts

Updating version to 1.9.8