add glob to allow for glob patterns in config.

[martindale]

This allows for the following pattern to be specified, which looks something like this:

exports.config = {
  nodeName: "application_server",
  logStreams: {
    apache: require('glob').sync('/var/log/router/+[access|error]*.log')
  },
  server: {
    host: '0.0.0.0',
    port: 28777
  }
}

[msmathers]

v0.4.3 uses JSON configuration, so it won't support 3rd party node libraries. In the future we'll look into doing dynamic paths for file watching, but will need to evaluate all candidate approaches.