LONDON—Let me start my review of an exquisite exhibition with a small gripe: " Ancient India: living traditions " is saddled with a terrible name. The oh-so-obvious juxtaposition of opposites—of "ancient" with "living"—comes straight out of Headline Writing 101. Couldn’t the British Museum, the greatest repository of cultural artifacts in the world, have come up with something a little less clunky, a little more stylish, for a display that seeks to highlight how religious traditions born before