It feels like the existence of Jippaa Jimikki serves only to temper any enthusiasm we might have about Tamil cinema’s potential for change, especially after seeing two genuinely good films—Kirumi and Kuttram Kadithal—released in the same week. It's hard to imagine there being another reason for this film’s creation. Director Rajasekaran appears to have unearthed a storyline—about people who despise each other find…