RF testnd:  MultiEffectResult baseclass
SETUP:  take PySurfer out of install_requires
FIX Dataset.rename():  assert new name is legal
API Factor:  `rep` argument -> `repeat`
ENH Var:  add ``repeat`` and ``tile`` arguments
ENH MneExperiment:  handle subject_re patterns and eog_sys

Use subject name to recognize the MEG system and set eog_sns appropriately
RF unpack_epochs_arg():  flatten function (was pseudo-recursive)
FIX plot.TopoButterfly:  plot axes labels from epoch names
DOC:  plot.Butterfly
API datasets:  get_rand() -> get_uts()
STY:  pep8
STY plot.UTSState:  don’t use kwargs dict
ENH plot.UTSStat:  set clusters during _init__
OPT/STY stats:  confidence_interval
STY opt:  no private function names
UPDATE opt:  Cython 0.21
AMD CI
FIX Factor.cells:  don’t freeze
ENH confidence_interval:  pooled variance for categorial predictor
gitignore:  PyCharm