Integrate mio support

[Kixunil]

I believe it would be beneficial to add support for mio (poll multiple FDs). This should be possible with conditional compilation.

[nastevens]

This should definitely be possible in mio 0.6, which has added the Evented trait to allow custom implementations of asynchronous I/O. The actual implementation could be delegated to the underlying file descriptor. The most logical place in my mind to add this would be the PinPoller struct - adding a feature-enabled impl of Evented.

Is this something you're looking to take on @Kixunil? I've worked with mio before and would be happy to mentor if you have questions.

[Kixunil]

What's the advantage of having separate PinPoller? Is it setting correct interrupt? Also, I'm wondering how this could be integrated with Futures/Tokio.

I did try mio, so I know how to do and I'll be very happy to do it because it will improve one project I'm currently developing. However I have some things to do, which have higher priority to me. Anyway, I expect I could implement it until Christmas. What do you think?

[pheki]

Hasn't this been fixed by #26?

[Kixunil]

@pheki yeah it was, I completely forgot about this issue. Thanks for ping.