By Susie Cagle, grist.org Organic gardens! Canning! Sewing clothes! All the chickens! The modern rise of homesteading (of the hipster variety) has gripped the nation’s urban centers. It’s been kind of like this: Self-sufficiency can’t be bad, though, righ… RT @grist: Gardening and sewing clothes aren’t just activities for hipsters http://flip.it/JnK5y http://flip.it/9OQAU Are trendy homesteaders…