* Changing root script for tests under Node.
Was: tests/jsunit/test_runner.js
Now: tests/test_runner.js
The webdriver & jsunit calls formerly in tests/jsunit/test_runner.js
are now in function runJsUnitTestsInBrowser, in
run_jsunit_tests_in_browser.js, called from tests/test_runner.js.
This makes room for additional tests under Node, such as headless and generator tests.