So you think you're on the coffee cutting edge, do you? Whether cold brewed, nitrogen-infused, poured-over or robot-crafted, if it's a new craft coffee trend, you've tried it. But have you roasted your own beans? Don't feel so bad. Most people haven't. Now, however, may be your chance. That's because now the Kelvin, a new app-powered home coffee roaster, just launched today on Kickstarter.