Redirect stdout and stderr to client

[tinmarino]

Instead of getting them in the old sys.stdout Fix part1 of issue #2

[tinmarino]

I think, by default, every user want to see his own output. The last implementation is changing the output only of the current thread: 54970642 Note: if someone else is tampering with std streams (ex: an other async kernel), it should work flawless : the new proxy will call his one if not in the current kernel thread.

What do you think of it? If you don't like it, may you tell me the name of the witch parameter ? Something like redirect_stream=False.

[albertz]

Thanks. Squashed and merged.

[tinmarino]

Thank You Albertz, you wrote a pretty good kernel. And were really fast to review my PRs.