add whitespace to fix cmake warning
added option to use libstdc++ for libshogun on OSX, defaults to libc++ if compiled on OSX
use libstdc++ for libshogun on NOT OSX by default
Fix typo in tester script
make bmrm example return some output
kmeans++ added
Merge pull request #1817 from mazumdarparijat/new_kmeans

kmeans++ added
Make KMeans::get_use_kmeanspp() const properly.
Fix typo in KMeans++ graphical example.
don't be overly verbose when comparing objects
fix typo
fix exception in tester
run quietly when comparing / only when results differ run verbosely again
produce more verbose / reasonable info when parameters differ
Example fixes:

- rename bmrm file (typo...)
- normalize kernel in histogram word string kernel example
- fix asser in serialization example
tester

- compare pickled output - if that matches return true already
- if it doesn't match fall back to shogun eps comparison (not this can
		differ due to representation inaccuracies of pickled objects)
add to_multiclass_structured in LabelsFactory and use that for bmrm example / test
fix ClusteringMutualInformation - init matrix as zero fixing valgrind errors and tests
Update data submodule
Merge pull request #1823 from iglesias/develop

Update data submodule