RM:  wxgui.MEG
DOC
API:  add `_set_log_level()`
FIX testnd:  unpickling old ANOVA results
FIX MneExperiment.make_copy():  mkdir=True
FIX MneExperiment:  TFCE report
ENH Notification:  Include sender host in subject
SETUP:  require numpy 1.8 (for `in1d()` `invert` kwarg)
FIX MneExperiment.add_evoked_stc():  don’t make unnecessary annot files