Fix for Debian

Fixed Debian error - [[ ! ]] cat: /etc/os-release: No such file or directory
Fix Arch Linux detection for updated lsb_release
Add experimental 2bwm detection
Merge pull request #95 from woodrufw/master

added redirects to prevent error messages
Merge pull request #92 from motoko-kusanagi/patch-1

Fix for Debian
Merge pull request #94 from mxtm/master

Fix Arch Linux detection for updated lsb_release & add experimental 2bwm detection (untested by me)
fixed dual GPU detection formatting