Prices at Chipotle, McDonald's and other fast-food giants in California are rising after a minimum wage hike went into effect.  "Chipotle said in an investor call Wednesday that prices at its nearly 500 California restaurants climbed 6% to 7% during the first week of April compared with last year, playing out across its menu," The Wall Street Journal reported Sunday. "The state isn't making it easy," Chipotle Chief Executive Brian Niccol reportedly said. CALIFORNIA'S $20 MINIMUM WAGE FOR FAST-FOOD WORKERS G ...