Add more tests for IndexedDB exception

 - rewrite the valid checkpoints from #292
Add more tests for IDBCursor update
Add a test for IDBFactory cmp
Use 'new TypeError()'
Add more tests for IDBIndex get
Fix open issues
Remove 'oncomplete callback'
Add more tests for IDBIndex openCursor
Add more tests for IDBIndex openKeyCursor
new test to make sure implementations send upload progress events for cross-origin requests
button, span, table, verification (including manipulation) test pages
Test pages for test assertions 4.3 and 5.3
Review comments processed
Start to add docs to this repo instead of on testtwf-website
Add information about test location.
Add documentation about configuring.
Add basic documentation on running tests
fixup! Add basic documentation on running tests
Whitelist use of w3c-test.org in docs and allow whitelisting all linting for certain files.
Test format documentation