FIX: tests + repr
COSMITS + FIX serialization bug
FIX: n samples raw
FIX: read write n_samples
COSMITS
ENH: improve tests
Merge pull request #710 from dengemann/ica_enh_repr

ENH: add information on numbers of samples used on fit to ICA..
FIX: sklearn cs_graph
COSMITS
Merge pull request #712 from dengemann/fix_cs_graph

FIX: sklearn cs_graph