Upload progress

[mrzmyr]

Its would be great to have a upload progess or something that indicates the upload while uploading larger files. For now it just logs whens its finished.

Thanks for the great work, keep it up. 👍

May adding something like this (Reference):

var req = s3.putObject(params)
  .on('httpUploadProgress', function (progress) {
    console.log(progress);
  }).send(function (err, data) {
    console.log("FINISHED");
  });

[pgherveou]

That would be nice indeed!
I dont have the time to work on it but feel free to send me a PR!