demo server.js broken for architect 0.1.5 and 0.1.6

[rawberg]

Looks like architect changed and no longer includes a plugins directory or the architect.log plugin. The demo server.js file is trying to include architect.log which is now throwing an error which prevents the demo server from starting.

    {
        packagePath: "architect/plugins/architect.log"
    }

Not sure how to correctly update server.js as just removing the reference to architect.log doesn't solve it. Alternatively we could just lock the compatible architect version to 0.1.4 which still works.