ENH: add trial browser to plot epochs
FIX: trial count
ENH: use set_data
MISC
FIX: use flatten not flat for axes
ENH: update example
COSMITs
COMSITS+PEP8
ENH: add rejection interface
ENH: fix bad re-draw
ENH: memorize rejection across views
add reject button
FIX: Bug where no bad channels present.
Merge pull request #8 from pravsripad/prav_tests

FIX: Bug where no bad channels present.
ENH: add block parameter
Merge pull request #772 from dengemann/improve_plot_epochs

[MRG]: add interactive rejection to plot epochs
wip, not working
ENH: Much faster
ENH: Little bit faster, added test
ENH: Twice as fast by using np.einsum