Update scratch-blocks to the latest version 

Remove prune step from deployment for now

Update scratch-l10n to the latest version 

Sort variable options in "of" block

It doesn't affect greenkeeper subdirectories, which are the ones that cause the most issues. And now the prune step itself is breaking builds. So until it works better, remove this step.

require text-encoding only if it is needed

Set an initial message number to skip rendering a second time

chore(package): update scratch-vm to version 0.2.0-prerelease.2019020…

chore(package): update scratch-render to version 0.1.0-prerelease.201…

Closes #4513

Multiple file upload for costumes, sounds, backdrops and sprites

Closes #4510

Merge pull request #4512 from LLK/revert-4501-greenkeeper/scratch-render-0.1.0-prerelease.20190206213754

Revert "Update scratch-render to the latest version "

chore(package): update scratch-vm to version 0.2.0-prerelease.2019020…

Closes #4506

Use blob download instead of data-uri to enable large downloads

This was already being used for sb3s and sprite3s, but the code was repeated in different places. Make a single helper that downloads blobs, and make all download paths use it.

chore(package): update scratch-vm to version 0.2.0-prerelease.2019020…

Closes #4503

Update scratch-render to the latest version 

Update scratch-blocks to the latest version 

Update scratch-l10n to the latest version 

Update scratch-blocks to the latest version 

chore(package): update scratch-vm to version 0.2.0-prerelease.2019020…

Closes #4480

Wait until loader becomes stale to continue in project loader tests

Escape special characters in toolbox xml