ENH MneExperiment:  add .make_mrat_evoked()
DOC MneExperiment
DOC reference:  add MneExperiment
ENH Notifier:  Log when entering notification
ENH Report:  add .sign()
DOC:  add recipes section
WIP GUI
WIP:  API:  enforce Dataset keys to valid variable names
ENH MneExperiment:  manage bad channels with files