//Example using Defaults
fetchData("http://someurl.com", null, function(err, data){
  if(err) {
    // do something about it
  }
  //No errors? Sweet let do some work!
  //...
})

//Example using options overide
fetchData("http://someurl.com", { method: 'post'}, function(err, data){
  if(err) {
    // do something about it
  }
  //No errors? Sweet let do some work!
  //...
})