Revert "remove ml_classifieres from depend"

This reverts commit 902df8ad941f6a287476f45f2918b49739d4c8e6.
Revert "Trimmed the branch to only the 3rdparty/sklearn sub directory"

This reverts commit d10dae74b430ae9325caf3e8c7f1016dbea5339f.
Rebase from 'upstream'
Trimmed the branch to only the 3rdparty/sklearn sub directory
remove ml_classifieres from depend