- Fix the tests for beforeunloadalert
- Remove exclusion of beforeunloadalert tests
- Add a couple new tests to improve coverage
Satisfy JSHint so it is happy again.
Merge remote-tracking branch 'plone/master'
Allow you to specify which test file you want to run with make test pattern=foobar

Works for make test-chrome pattern=foobar too.

Update documentation to reflect the changes.