College towns and coffee joints go together like peanut butter and jelly. This is good news for Jason and Amy Silberschlag, founders of Cartel Coffee Lab, whose Tempe-based roaster and coffee bar is mere meters from Mill Avenue. Open less than a year, they've earned legions of adoring fans, both for their straightforward approach to coffee and their Clover 1S, which set the gold standard for coffee machines. The Clover brews coffee to order, one lovin' cup at a time. But it's not just the eq