* Remove useless MemoryStream in DlnaHttpClient
* Use HttpContent.ReadFromJsonAsync extension
* Call ConfigureAwait for IAsyncDisposable
* Use HttpContent.CopyToAsync where possible
* Use Guid.Equals(Guid) instead of the == override
* Ban the usage of Guid.Equals(Object) to prevent accidental boxing
* Compare to default(Guid) instead of Guid.Empty