Merge pull request #22 from gjtrowbridge/master

feature(helpers.js): Implement first basic helper function
configured package.json for npm test
covered Game.js with tests
Merge pull request #23 from jamesyothers/master

configure package.json for npm test and covered game.js with tests
fix(Game.js): Fix killMessage and attackMessage to say which hero was attacked or killed
Merge pull request #24 from gjtrowbridge/message-fix

fix(Game.js): Fix killMessage and attackMessage to say which hero was at...