The test.js task starts the development server and runs the tests in PhantomJS. As mentioned in the readme, when running the tests continuously during development, it is more convenient to start the dev server and visit the root of the test directory in your browser.
Later we can bring in Karma to drive PhantomJS and other browsers, but this simple "run once" task is useful for the CI job.
The closure-util package works on Node 0.8, 0.10, and 0.11 (as of this writing), but it requires an updated version of npm to install on Node 0.8. For the build to pass on Travis, we update npm before installing other dependencies. For others who are installing the openlayers package, nothing special is required for Node 0.10 and above. For users on Node 0.8, the openlayers package will only install with an updated version of npm. This can be installed with npm itself.
npm install -g npm # only needed on Node 0.8
