Added heroku/clojure image to app.json
Added heroku/clojure image to app.json

jkutner/feature-demo,jkutner/feature-demo,immutant/feature-demo,immutant/feature-demo,FalseProtagonist/graphagora,FalseProtagonist/graphagora,FalseProtagonist/graphagora,immutant/feature-demo,jkutner/feature-demo