adding dist to gitignore
adding dist to gitignore

siddhartha-gupta/angular2-tic-tac-toe,siddhartha-gupta/angular2-tic-tac-toe,siddhartha-gupta/angular2-playground,siddhartha-gupta/angular2-playground,siddhartha-gupta/angular2-playground,siddhartha-gupta/angular2-tic-tac-toe