FIX: Use genfromtxt to read channel names from .locs (#6090) (#6095)
FIX: Use genfromtxt to read channel names from .locs (#6090) (#6095)

Channel names read from .loc, .locs, and .eloc files were truncated to 4
character strings ("S4" numpy dtype).  Using genfromtxt with "str" as
dtype lets numpy determine the required length and allows for reading
unicode characters as well.
kingjr/mne-python,cjayb/mne-python,bloyl/mne-python,larsoner/mne-python,kambysese/mne-python,kingjr/mne-python,pravsripad/mne-python,pravsripad/mne-python,olafhauk/mne-python,larsoner/mne-python,bloyl/mne-python,Teekuningas/mne-python,cjayb/mne-python,mne-tools/mne-python,Eric89GXL/mne-python,adykstra/mne-python,mne-tools/mne-python,Teekuningas/mne-python,kambysese/mne-python,wmvanvliet/mne-python,wmvanvliet/mne-python,olafhauk/mne-python,olafhauk/mne-python,larsoner/mne-python,Teekuningas/mne-python,rkmaddox/mne-python,drammock/mne-python,rkmaddox/mne-python,mne-tools/mne-python,wmvanvliet/mne-python,drammock/mne-python,pravsripad/mne-python,Eric89GXL/mne-python,kingjr/mne-python,drammock/mne-python,adykstra/mne-python