Tie-dye is making a comeback in the fashion world (though most higher end shops are calling it "dip dye"), and it's not uncommon to hear Phish or The Grateful Dead playing at a coffee shop on Bedford Avenue...but are all of these signs that hipsters are becoming hippies? It seems the proof is in the homegrown pudding, as The NY Times reports on many young city slickers trading in their tight-jeans for some overalls (making......