As a rule, I’m not a fan of prequels. But rules were made to be broken, and “War For The Planet Of The Apes” manages to thwart two of mine: it’s a superb prequel and it’s the third chapter of a trilogy which is the best of the three. In the aftermath of Koba’s betrayal and attack on the humans, Caesar (Andy Serkis) and his tribe of apes are hiding in the Californian forests, forced into a…