Add detection for Slackware version
Don't fail if `ip` is not available.
Add support for mdstat info.
Update README.md
Added hostname polling
Merge branch 'master' of github.com:twouters/host-info-gatherer
Merge pull request #1 from twouters/master

Add support for Slackware version detection, /proc/mdstat and don't fail if `ip` is unavailable (from twouters)