Add support multipart upload

[Laeyoung]

Amazon S3 only support upload objects up to 5 GB with a single PUT operation.

http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html

When app try to upload a object which is more than 5 GB size, this library returns 'success' without actual uploading.
If AmazonS3RequestManager supports multipart upload, it will be fixed. : )!

[AnthonyMDev]

@Laeyoung This is absolutely a good feature for the library to have! I don't have any production need for this personally currently, so I can't make it a priority right now, but I will add it to the backlog!

If you would like to implement this and make a PR I'd be happy to discuss design with you can then review a PR.

[Laeyoung]

I will try to implement it and make a PR soon : )!

[MattTimmons]

Hi @Laeyoung !
Have you had any luck on the PR? for multipart ?

• Matt

[vccabral]

@AnthonyMDev I would love to have a multipart upload. I am currently getting sporadic 1005 errors while using this library (lost connection errors).

[AnthonyMDev]

I would love to see this feature as well. I unfortunately don't have the time and means to implement this currently. I am hoping I will be able to get to this some time in the near(ish) future... If someone would like to make a PR, I am happy to pull it in though!