Add location to work object

[vikramsoni2]

I would like to add job location as "location" attribute to work object. If you think it make sense, let me know I can create a pull request.

[vikramsoni2]

I see in tests this section:

test('work[].location - valid', (t) => {
  validate(fixtures.locationValid, (err, valid) => {
    t.equal(err, null, 'err should be null');
    t.true(valid, 'valid is true');
  });
  t.end();
});

so looks like there is location in work. however, its not in the example schema on the website.