API:  .utils -> ._utils
RF unpickle:  take care of legacy pickles in load.unpickle()
API:  .ui -> ._utils.ui
API:  import from eelbrain directly

Deprecate eelbrain.eellab and eelbrain.lab
ENH MneExperiment:  allow custom parcellations
API:  RM legacy brain-vision and KIT support
FIX _corr:  replace NaN with 0
DOC:  about, load
API:  RM data.process module
RF:  move .data -> eelbrain namespace (& RM plot.coreg)
FIX TEST:  test_examples, decrease number of permutations in MEG examples
DOC
RF plot:  lazy wx import
API:  retire Dataset.N
FIX make test:  run all tests
SETUP:  add extras_require
TEST anova
FIX _corr():  for one dimensional input
DOC anova:  NotImplementedError for empty cells
API:  wxgui -> _wxgui