ENH: add subtract_evoked option to tf_lcmv
ENH: add subtract_evoked option to tf_lcmv
ENH: add subtract_evoked option to tf_lcmv
WIP: add test of tf_tcmv with subtract_evoked
FIX: avoid division by 0
cosmetics
remove trailing spaces
Merge pull request #812 from adykstra/subtract_evoked_from_epochs_tf_lcmv

ENH: add subtract_evoked option to tf_lcmv
FIX: Check nibabel version
ENH: Add raw.plot_psds()
STY: Better message
Merge pull request #821 from Eric89GXL/vs-nib-fix

FIX: Check nibabel version
FIX: Failing test for fit_transform()
Merge pull request #823 from mainakjas/csp_test_fix

FIX: Failing test in test_csp.py
STY: Clearer matplotlib
STY: Different plt
Merge pull request #822 from Eric89GXL/raw_plot_psds

ENH: Add raw.plot_psds()
FIX: Update python_reference
FIX: Update whats_new