Aquaero plugin

Hi!
This a plugin to read the sensors from the aquaero 5 USB board, which includes a set of temperature sensors, fan controllers and a programmable controller. The plugin is based on the aerotools-ng project, which is very experimental yet.

Please consider pulling this plugin and I'm happy to hear comments from more experienced people on the collectd plugins. I'm currently running it on my server (rebased and compiled to collectd-5.1.0) and looks good.

Thanks!