DeOSS v0.4.2

Changed

1. Files that fail to UploadDeclaration will not be reloaded again
2. Supports hex and base58 encoded signatures
3. Add GetUserFilesHandle
4. Update GetMetadataHandle
5. Disable uploading when server space is insufficient

Fixed

1. Not adding users to the owner list when storing existing files.
2. Failed range requests.
3. Calculate the actual space occupied by the file.

Full Changelog: v0.4.1...v0.4.2