Printable Linear Rail, Horizontal

This is a simple track, meant to go with my [Printable Carriage](http://www.thingiverse.com/thing:2132360) model. Unlike other printable rails I've seen, this one is designed to be printed horizontally. This takes advantage of the grooves formed by the lines laid down by a 3D Printer instead of working against them, as was the case for the rail originally intended to be used by this carriage. This should be a simple print for just about any printer on the market, and is designed to be easily lin