Henge Docks has been making MacBook Docking Stations for a few years, but up until now they’ve all been vertical units that stood your computer up and added passthroughs to the ports. At the 2013 International CES, the company decided to turn its flagship product on its side—literally. Coming in the second half of this year, Horizontal Docking Station ($249-$349) gives your MacBook Air or MacBook Pro with Retina display a home on your…