Support disk, net and process

[drsect0r]

Provide additional support for disk, net and process information. (https://github.com/shirou/gopsutil/)

[deankarn]

Hey @drsect0r

This library is more geared towards the stats of the Go program/process rather than the host system itself, I am however ok with also adding disk, net and process information.

I definitely won't have any time to work on this any time soon and any help anyone could provide would be great 👍