ENH load.fiff:  handle unit assignment automatically
RF wxterm help:  simpler organization (less subclassing)
FIX SelectEpochs:  vlim specification
ENH testnd t-tests:  `tail` parameter
DOC/STY
FIX:  MneExperiment.make_proj()
FIX:  Ordered.dimindex()
ENH MneExperiment:  remove hp.1 option because DC is hp filtered at .16
OPT testnd._t_rel:  split large inputs
FIX plot.TopoArray:  t kwarg
ENH colorspaces:  group colormaps