RF wx_ui:  use wxgui app
API experiment:  make submodules private
FIX data-obj:  unicode Dataset keys
API plot.UTSStat:  only use axtitle argument with Xax
API MneExperiment:  make .run_subp() private
STY MneExperiment
FIX plot.UTSStat:  legend
CLN subp
FIX subp:  don’t change environment vars
FIX wxgui-draw_text
ENH wxgui-draw_text:  colors
STY testnd
TEST testnd reproducibility
FIX testnd: memory leak

replace Queue with SimpleQueue
DOC EelFigure:  Layout arguments