- Fixed metrics for Total Requests, Handled Requests, and Accepted Requests to provide
  trendsup data so the resulting data will be request rates, not ever-increasing counters
  which are not very useful

- Added a version string for Hyperic >= 4.6.0

- Some general cleanup of the code so that it is now also possible to
  monitor servers not listening on localhost

- Fixed the help text for the plugin

The plugin was tested on a plain vanilla Ubuntu 12.4.04 LTS server with Nginx 1.1.19.

TODO: Auto-Discovery of nginx does not work properly yet. This issue is under investigation.