Big change, we use poll() now instead of select()

1) It is faster.
2) I think this means bye bye to the random write failure.

Difference?

select():
Testing user_supplied_bug1                                       3.512 [ ok ]
Testing user_supplied_bug2                                       3.461 [ ok ]

poll():
Testing user_supplied_bug1                                       1.324 [ ok ]
Testing user_supplied_bug2                                       1.303 [ ok ]

This commit also update variables for next release.