I explained them in a post about a year ago: http://tumbledry.org/2011/05/12/screw_hashbangs_building http://tumbledry.org/2011/05/12/screw_hashbangs_building

I explained them in a post about a year ago: http://tumbledry.org/2011/05/12/screw_hashbangs_building http://tumbledry.org/2011/05/12/screw_hashbangs_building which was discussed here: http://apps.ycombinator.com/item?id=2592741 http://apps.ycombinator.com/item?id=2592741