Receiving from a port doesn't block correctly.

[eholk]

See https://gist.github.com/979173

This program should hang indefinitely. Instead, it runs and exits successfully. It seems that when the read call goes to block, it doesn't really block and just keeps on going. It's rather bizarre that this works.

[eholk]

Hopefully once we get the tasking system running better this problem will go away.

[eholk]

After getting task yielding working again, this program is blocking like it's supposed to. I'm going to assume this means the bug is fixed.