Add Debian to *nix prereqs

Debian uses apt, and can successfully install dependencies running the script as dist=Ubuntu. [test output running Debian Jessie](https://gist.github.com/humanoidanalog/7784653)
Add Debian to Readme

Debian dependencies work extremely similar to Ubuntu dependencies, work fine for the most part
Add extra prerequisites to config script
Updates to build on Debian

Some last fixes to get it building.
Merge pull request #1 from sjml/patch-2

Updates to build on Debian
Merge pull request #6 from humanoidanalog/patch-1

Add Debian to *nix prereqs