Updates: Excel, FAQ, and a Bash script

Pretty strong updates today. First off, Jonathan Colson was kindly enough to provide a distance calculation function for Excel. (http://zips.sourceforge.net/#dist_calc)

Peter Santoro has graciously donated a bash script that converts from CSV to SQL Inserts. It is generic SQL and should work in every SQL-compliant database. (http://zips.sourceforge.net/mkzipsql.sh)

Finally, I've added a FAQ to the site.