Support for streams

[mgrishaber-merlin]

Hello,
I am wondering if there is support for streams. I have a scenario where I would like to use the rewriteAllTags function to repair exif tags on an incoming stream and pipe that stream to ImageMagick to further convert the image.
From what I can tell I will have to write the incoming stream to a temp file, call rewriteAllTags on that file and then create a read stream for the resulting temp file.
Is there a way to avoid creating temp files and use the stream directly, and is there any problem with performing operations concurrently?

Thanks in advance

[mceachen]

See #2 and #100