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

sprenger fa61ce1559 gin commit from nit-ope-de04		3 vuotta sitten
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sub-i_ses-140703_task-r2g_run-001_channels.tsv	fa61ce1559 gin commit from nit-ope-de04	3 vuotta sitten
sub-i_ses-140703_task-r2g_run-001_contacts.tsv	fa61ce1559 gin commit from nit-ope-de04	3 vuotta sitten
sub-i_ses-140703_task-r2g_run-001_ephys.json	fa61ce1559 gin commit from nit-ope-de04	3 vuotta sitten
sub-i_ses-140703_task-r2g_run-001_ephys.nix	4ec2a070ab gin commit from nit-ope-de04	3 vuotta sitten
sub-i_ses-140703_task-r2g_run-001_probes.tsv	fa61ce1559 gin commit from nit-ope-de04	3 vuotta sitten