Installing RVM, Ruby, Heroku, Homebrew, Node.js, NPM
http://devcenter.heroku.com/articles/quickstart
http://martinciu.com/2011/11/deploying-hubot-to-heroku-like-a-boss.html
1. install RVM: https://rvm.beginrescueend.com/
2. install Ruby: rvm install 1.9.2 && rvm use 1.9.2 --default
3. install Heroku: sudo gem install heroku
4. install Homebrew: https://github.com/mxcl/homebrew/wiki/Installation
5. install Node.js: brew install node
6. install NPM: http://npmjs.org/
7.