updated gemfile.
commit for ec2 push.
added require rubygems to run the app.rb with ruby command.
added another require to app.rb
added a unicorn.conf and modified config.ru
added app directory to unicorn.conf
pushing to home/user dir.
added execjs to Gemfile.
updated Gemfile.lock
fixed listen string in unicorn.conf
fixed string in unicorn.conf
added an image to images dir
added the github_hook.rb file from Up and Running book example.