Add file upload input to test results viewer.

[amichair]

The results viewer page for custom test results is great, but currently requires one to browse for and open the results file in an editor, copy the entire contents, paste them into the page, and submit. It would be nice to just upload the file directly to the page and skip the editor/copy/paste.

In addition, It's usually the case when viewing such results that you do it multiple times in a row (run test, view results, tweak something, run it again, etc.)... why not leave the input form visible at the bottom of the page or something like that, so you can just do it again on the same page?

[bhauer]

These issues are for the results web site (which has no GitHub repo) and not for tfb-status specifically. That said, they are good feedback and I'll see what I can do on the results web site.

[michaelhixson]

We hope to address this use case as part of #19.