Five new companies, plus an expansion at the Starbucks roasting plant in Douglas County, will directly and indirectly add about 300 jobs and infuse about $42 million into the local economy over the next two years, according to Northern Nevada Development Authority, which introduced the newcomers at a breakfast it hosted recently in Carson City.Several of the companies are relocating to Nevada from California, where the firms say taxes, regulations and other issues make life difficult to conduct business."I was done with California," says Greg Havemann, president, AnC Machining Inc., a 30-year-old parts maker and service supplier for aerospace and …