Normalization in CHashedDocConverter class
Drop deprecated dense computation of all the outer products in LMNN and its unit test
Modify ImpostorNode in LMNNImpl from class to struct
Better debug output in LMNN
method actually uses CGaussianDistribution which needs Eigen3 so ifdef with that
Merge pull request #1330 from van51/develop

Normalization in CHashedDocConverter class
Merge pull request #1358 from iglesias/feature/lmnn

Feature/lmnn
Added HashedDocDotFeatures in modular interfaces
Merge pull request #1363 from van51/feature/modular

Added HashedDocDotFeatures in modular interfaces