_handle_dict call for p.ecg_t_lims (#328)
_handle_dict call for p.ecg_t_lims (#328)

* ENH: Add options for HEOG/VEOG

* tweaks to heog + overwrite param exposure

* fix

* fix veog path

* no overwrite

* handle dict call for ecg_t_lims

Co-authored-by: Eric Larson <14e6e0d1a6421c3f4a71ec06bfae870e115e40b0@gmail.com>
drammock/mnefun,LABSN/mnefun,drammock/mnefun,ktavabi/mnefun,ktavabi/mnefun,LABSN/mnefun