STY _data_obj:  pep8 & consistency

- capitalized variable names
- 2 line breaks between functions
- docstrings
- consistently use x as first argument
FIX MneExperiment.load_evoked_stc(morph_stc=True):  

set subject attr to common_brain
ENH GUI:  proper Window menu
PROFILE

- update lm
- add connectvity
OPT opt.merge_labels()
OPT opt.merge_labels()
OPT opt.merge_labels()
STY GUI App
ENH Barplot:  allow colors as dict
FIX mpl-canvas:  canvas size

- use correct figure size
- respect matplotlib-rc params
ENH Eelfigure:  add .save() method

replicate mpl figure.savefig() method
RF plot:  Layout argument order, use mpl default for DPI
STY select_epochs-GUI
ENH plot-uv:  accept normal layout kwargs
WIP plot-color:  tools for color dicts
STY:  use _EelFigure directly
STY plot (pep8):  legend -> Legend
ENH datasets.get_uv():  seed random state
FIX plot-uv:  respect matplotlib-RC
ENH plot:  better frame titles for `y`-plots