By Alex Lauer On Tuesday, Tesla’s German factory officially started spitting out electric vehicles. CEO Elon Musk was there at Giga Berlin-Brandenburg, the company’s first factory in Europe, to hand off the first models to customers, and to dance a little jig which is becoming his calling card. If there’s any occasion to break into spontaneous dance, plopping down a plant capable of producing 500,000 cars a year on the home turf of the German automotive powerhouses is it. It hasn’t been an easy road to the finish line, however. Despite opening speeches praising the speed at which Tesla built t…