Fix doc typo
Add multiclass classification illustration to LMNN notebook
Merge pull request #1651 from gsomix/feature/protobuf

Protobuf based binary fileformat for reading/writing vectors/matrices with shogun
Merge pull request #1657 from iglesias/feature/lmnn

Feature/lmnn
add HAVE_PROTOBUF to classlist .py
add string list support for ProtobufFile