- Add jshint support
- Improve name of eslint output file for use by Jenkins

- Use builddir instead of bare /tmp to make sure it's a directory and not a symlink that phing would choke on.

- Installing phpDocumentor via Composer was causing dependency conflicts; this offers a more self-contained approach to using the tool.

- This works around a technical issue in Vagrant; it also makes some logical sense.

- Also use Phing for Swagger-UI installation for better cross-platform support.