ENH stats:  ADD variability()
ENH Barplot:  use new variability estimates (&FIX)

FIX Var.info access for ylabel
ENH plot.UTSStat:  use pooled error variability
STY _ax_uts_stat
ENH datasets:  Add rm variability to uts
RF GUI:  sensor label options handling
GUI:  set default sensor labels to ‘name’
FIX plot.SensorMaps
DOC changes:  variability with pooled error
API plot:  change argument for plotting error estimates to `error`
AMD changes
API:  import UV plots into plot module
API plot: make submodules private (except plot.brain)
DOC clean up files