DeltaV

This release changes the dependency on the photodiode square wave being zscore above the baseline to depending on the change in voltage being above the baseline. For very long photodiode deflections, voltage was trending back to baseline, making pd-parser not usable for this.

Cleaning up plotting by making longer events accepted was also added.

Several small bugs, including an issue with negative deflections were fixed.

:func:pd_parser.add_off_events was fixed so that it always found the off event corresponding to the on event.

BIDS functionality was updated to the latest mne-bids version.