CMosek added variable bounds
KD-Tree and Ball tree added in a unified interface
fix bugs in ExactInference
Merge pull request #2376 from mazumdarparijat/distance_trees

KD-Tree and Ball tree added in a unified interface
Merge pull request #2381 from yorkerlin/develop

fixed bugs in ExactInference
Merge pull request #2372 from hushell/dev

CMosek added variable bounds
added the python script and increase the robustness of the KL methods
update the python script
kde added
Implemented deep belief nets
dual distance methods added;minor changes
Merge pull request #2388 from khalednasr/autoencoders

Implemented deep belief nets
Merge pull request #2386 from yorkerlin/develop

added the python script for KL methods
Merge pull request #2383 from mazumdarparijat/kdensity

kde added
Added neural layers builder (with test and python example)
Merge branch 'develop' of https://github.com/shogun-toolbox/shogun into develop
Modified multilabel_structured_prediction notebook according to template