API:  ttest -> ttest_1samp, ttest_ind, ttest_rel
ENH Sensor:  variable connect_dist for connectivity
ENH ClusterDist:  keep track of time from .add_original() to ._finalize()
ENH plot._base:  avoid try statement when creating figure;  use my frame if mol backend uses wx
ENH plot:  make sensor toolbar into mixin, add it to plot.sensor.map2d()
TEST plot.sensor.map2d()
ENH WxTerm:  for MPL figures, copy-plus copies as png
ENH FileTree:  .show_file_status() for table of file existence
ENH MneExperiment.make_raw()
API MneExperiment:  .make_epoch_selection() -> .make_rej() for consistency
FIX MneExperiment:  ttest
ENH load.eyelink:  use mne.utils.run_subprocess
ENH Celltable:  Allow None entries in cat