She’s been an Web famous person, morning show guest, South by using Southwest big name and journal quilt lady. And now, Tardar Sauce aka “Grumpy Cat,” the sourpuss that’s spawned one million memes, can add a brand new role to the list: Artist’s muse. Over 30 artists at Lowe Mill ARTS & Leisure in Huntsville, Alabama, are contributing to “The Grumpy Cat Art Mission,” a group of artworks inspired via …