Merge Spork?

[ampelc]

Not really the most important thing, but this keeps us up to date (and it still hasn't been relicenced to AGPL so we're fine)

[ampelc]

There will be a lot of stuff needed in scratch-gui which did relicence. Maybe take some changes from a version of spork in scratch-gui that was in development prior to the relicence

[CubesterYT]

I think we could just merge upstream scratch-blocks rather than all the repos, that would at least give us a newer blockly platform, but I honestly don't know how we would go forward with this