v0.3.2

Fixed

• Fix the cyclomatic complexity is too high.
• Fix creates too many simultaneously alive goroutines and they are exceeded.
• Fix writing an empty file has no effect in the remote disk mode and the push mode.
• Fix writing an empty file or a same length file has no effect in the local disk mode.

Enhancements

• Add the chunk_size flag to support upload the big file by chunk.