Archlinux support

This adds support for Arch Linux/Arch Linux ARM. It has been around in my repo for a long time now, with a good number of users I believe, and rarely has issues.

First 3 commits are not directly related to arch, but necessary (especially the last 2).
These quotes aren't doing what you expect, since the entire block is encased in "
`\"` and `\$` are your friend.