It's hardly unusual to hear small-business owners gripe about licensing requirements or complain that heavy-handed regulations are driving them into the red. So when Multnomah County shut down an enterprise last week for operating without a license, you might just sigh and say, there they go again. Except this entrepreneur was a 7-year-old named Julie Murphy. Her business was a lemonade stand at the Last Thursday monthly art fair in Northeast Portland. The government regulation she violated? Failing to get a $120 temporary restaurant license.