ENH : Allow regularized covariance in CSP
interfaced with sklearn covariance estimators
interfaced with mne.covariance.regularize
add tests for regularized csp
CSP fit with mne.covariance removed
regularized CSP example added
regularized CSP example modified
comment modification
set group when updating website
Merge pull request #691 from trachelr/csp-cov-reg

ENH : Allow regularized covariance in CSP
FIX: sklearn version checking for regularized CSP
Merge pull request #695 from trachelr/csp-cov-reg

FIX: sklearn version checking for regularized CSP
use TransformerMixin, csp fix
sklearn is not Firefox
Merge pull request #698 from mluessi/use_TransformerMixin

Use TransformerMixin, csp fix
ENH: add copy param to ssp functions
Merge pull request #702 from dengemann/fix_ssp

ENH: add copy param to ssp functions
ENH/FIX: use RandomizedPCA for whitening

FIX: add intended changes
CLN: clean up tests
FIX: whitening