Create AIX mainline support

[ThePrez]

Addresses issue #5.

I tested and verified that the sunos implementation works for mainline AIX, since the netstat output is the same format. So, I just have it use the sunos module on AIX.

I tried several ways to do this if logic, including burying all the logic in the aix.js module, creating a new module and dynamically exporting the proper entry point from aix.js, and a couple others. In my opinion, this was the cleanest way, but we can refactor the best way you see fit.

Thanks!

[silverwind]

Approach seems fine, I probably will refactor this netstat parsing across platforms later to reduce code duplication. The branch seems to be in conflict, can you rebase?

[silverwind]

Also need to update package.json to include the renamed file.

[ThePrez]

Oops! Sorry for missing package.json

[silverwind]

I take it make test passes on AIX? If you do not have IPv6, run CI=true make test to skip it.

[ThePrez]

Yep, make test is clean
(sorry for the earlier linting errors, for some reason I was going straight to node --pending-deprecation --trace-deprecation --throw-deprecation --trace-warnings test.js)