Make the install process a little bit easier

[booo]

I'm not an expert in wscript and c++ compiling/linking. Maybe there is a better solution?

I the wscript needs a little bit more love... Maybe we should add /usr/lib and /usr/local/lib as default library paths?

[chrisdew]

Thanks for the pull request - I'll get a new version out on npm later this week, once I've tested it.