Add Chunking Support

[propagated]

As of 4.1 Square9's API has the ability to receive parts of a file in what we call "chunks." It's often necessary to upload large files in chunks in order to circumvent iis file size limitations, as well as potential client and server-side memory issues.

The application could be enhanced to allow the user a choice between uploading all at once, and uploading in chunks. Also optionally the chunk size should be specifiable.

[propagated]

Documentation can be found here:
http://www.square-9.com/api/?api=REST%20API%20Resources#chunkingupload