Summerhall, EdinburghGig-theatre blends beguiling music with warm storytelling to retell the story of Phaeton's theft from the sun god In an airless basement room, Wright and Grainger weave a gentle story laced with gold. One man may fall asleep in the front row, but the rest of us are rapt in the delicate details of this old story made new. Alexander Wright is our gracious, slightly rugged host. His words swell with…