MAINT: Relicensing to Apache-2.0, for compliance with *NiPreps* and prior transfer to the org

[oesteban]

It's preferable to do the relicensing now, before transferring to the new org. If there are no objections, I'll be merging this in 3 days. I'll send a supporting email asap.

[oesteban]

I have sent the following email to all contributors for whom I managed an address:

Hello,

You are listed in the MRIQC's repository as a contributor (https://github.com/poldracklab/mriqc/graphs/contributors) and you either have your email posted in your GH profile or we have had some email exchange before. We are about to migrate the project into the NiPreps organization (https://github.com/nipreps), and the NiPreps community softly enforces the Apache-2.0 license. You can learn more (highly recommended read, BTW) here - https://www.nipreps.org/community/licensing/

I'm convinced this licensing change (and in particular from BSD 3-clause to Apache-2.0) will be uncontroversial for everyone who has contributed to MRIQC's code, but for the sake of transparency, I would like to open a window of 3 days to voice any objections against the change. You can write directly to me or express your opinion openly at #930. In the case that objections are transferred privately, I'll act as a proxy and make the rest of the contributors aware after anonymizing the source of the comments (more info about our code of conduct is found at https://www.nipreps.org/community/CODE_OF_CONDUCT/).

After the window of 3 days, and in the absence of objections or outstanding questions, the relicensing pull-request will be merged anytime during Friday 24 (CEST timezone).

Thanks very much for being part of MRIQC and looking forward to your future contributions. I will use this opportunity to introduce you to the NiPreps community - please check out https://nipreps.org

Best Regards,
Oscar

I failed to find an email address for @verdurin, @justbennet, @octomike, and @mgclark.