Removed `offsprint` form `package.json`.
`iptables.utils`:

* Removed specific `comments` match in favor of the `matches` object.
* Fixed issue function don't processing correctly negated argument (with leading '!').
Added basic support for tests.
Changed code style to match overall style.
Renamed `cmdQueue` to `queue`.
Added tests and concurrency information to documentation.
README: Added Contribute section.
README: FIxed minor styling.
Removed ending space.
Removed empty lines. Changed code style to match overall style.
README: Improved docs.
Added basic tests for all `iptables` methods.
CHANGELOG: Updated with latest changes.
Version bump.