LamineCisse/BEP032-examples: channel_type added in channel.tsv (BEP standard) add PowerLineFrequency in ephys-json for ephys_nwb_petersen file add PowerLineFrequency and PowerLineFrequencyUnit in ephys-json for ephys_nix file @ synced/upd/0.2.1

sklonowany z NeuralEnsemble/BEP032-examples

sprenger fa61ce1559 gin commit from nit-ope-de04		3 lat temu
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ses-140703	fa61ce1559 gin commit from nit-ope-de04	3 lat temu
sub-i_sessions.json	fa61ce1559 gin commit from nit-ope-de04	3 lat temu
sub-i_sessions.tsv	fa61ce1559 gin commit from nit-ope-de04	3 lat temu