stim_files not in BIDS format

[adelavega]

Hi @mih
The stim_file reference in the events.tsv files are close, but not exactly, in BIDS format.
In particular, paths to stimuli in the stim_file are relatively to the stimuli folder. Currently, stimuli/ is prepended to the paths, which is not necessary.

I created a short script to fix these files: https://gist.github.com/adelavega/7847a7595414a8c357d440de1c1cf6da

I've also used datalad to "unlock" and "add" the new version of the files. However, I'm not sure how I would go about doing a "PR" of these new files, or if that would be useful to you. I assume I could use datalad publish but I'm assuming I don't have push access to your remotes.

Let me know!

Best,
Alejandro