Add ext-pcntl dependency, and autoload info
update signature to match parent

This is fixed in the ipc branch, but master needs it, too
Fixing incorrect extension check condition (were "!!" instead of "!").
Merge pull request #29 from aik099/long-poll-example-fix

Fixing incorrect extension check condition (were "!!" instead of "!")
Merge pull request #26 from ex-nerd/master

composer.json fixes