Removing OS dependency

As far as I can tell there are no OS dependent components being used (please correct me if I'm wrong).

The current npm module is only checking for the first 3 OS's in the list: linux, darwin, and freebsd, which leads me to believe that the module is out of date.

As I'm relatively new to the node.js world I'm not sure if a version bump is sufficient or if a npm publish command is also needed to update the module.

See the thread here: https://github.com/dmcquay/node-apac/issues/27 on why the install wasn't working on Windows (it looks like 2 subsequent modules have been made to circumvent the issue: cyber-apac and json-apac).