slugify for dash (the bash like interpreter on Ubuntu)

slugify

#!/bin/sh
#
# Installation
#    mkdir ~/bin
#    cd ~/bin
#    wget http://gist.github.com/raw//5506188/slugify
#    chmod +x ~/bin/slugify
#
# Usage
#    $ lspci > ~/Desktop/pci-devices-$(slugify `date`).report
#    ~/Desktop/pci-devices-fri-may-3-08-45-01-cst-2013.report
#
#    $ slugify this That and Another
#    this-that-and-another 

echo $@ | sed -e 's/[^[:alnum:]]/-/g' | tr -s '-' | tr A-Z a-z