FIX SourceSpace.connectivity():  ico
ENH FileTree:  ADD FileTree.glob()
ENH MneExperiment:  ADD .backup()
API MneExperiment:  .load_epochs_stc() defaults

baseline:  None -> (None, 0)
ndvar:  False -> True
FIX testnd:  error message
FIX align1()
ENH align1():  check d_idx length
ENH align1():  align to Factor