Surely you remember CINCO Vodka, the “Austin’s Neighbor”-based, limestone-filtered, “martini-drinker’s” vodka I wrote about here? In one of the most ridiculously awesome ideas ever, CINCO has introduced a Cincominder app for the iphone. What does this app do? Why, the app reminds fans when it’s five o’clock—the perfect time to enjoy a great martini!—with the…