[feature] Download test case files

[ansemjo]

Thanks for this app. Never really used jsperf(.com) before but it's proving really useful already.

Is there a possibility to add some kind of "archive download" of the test case files?

• Like a simple download of relevant files in a zip or tar? README.md, setup.html, setup.js, testcase-1.js, ... etc.? It doesn't need to be executable, just for archival.
• Logging in with GitHub and having revisions feels like you're working on git snippets. Though I suppose a git connector would be quite some work?
• Saving everything to a single file, which could be opened locally, would also be fantastic but that's not what I mean here.