Web platform tests are copied from https://github.com/web-platform-tests/wpt.

Includes:
- `LICENSE.md`
- `accname/name*` test files
- `accname/foo.jpg`
- `wai-aria/scripts/manual.css`

Modified:
- `wai-aria/scripts/ATTAcomm.js` contains our own harness to avoid modifying test files
