Dick Butkus is still delivering hits — just a different kind. The Bears’ hard-nosed middle linebacker of the 1960s and 1970s just joined Twitter at the ripe old age of 79. He’s no longer treating opponents’ heads like twist-top bottle caps, but he’s still dishing it out: — Responding to a tweet claiming “you killed my grandpa on the football field”: “Probably deserved it.” — “Based on my numbers, the entire city of Peoria is following me.” — “Maybe the world needs butcoin. Can be used to purchase deep dish pizza and Chicago beef.” — “Fantasy football is what guys played after I hit them.” Head…