Travis fix-ish

When running the generator you can add the `--travis` flag. But there's three problems with it:
* `.travis.yml` specifies 0.8 as a valid node-version, but the packages installed with `npm install` don't support it, so the build fails.
* The karma-config files try to run Chrome, but that doesn't work on Travis so the build fails.
* Travis runs `npm test` after `npm install` but there's no `package.json` to define what that means, so the build fails.

This PR fixes the first two issues.