IF YOU ARE HAVING TROUBLES WITH THE INICIALIZATION OF THE PROJECT, PLEASE FOLLOW THIS STEPS

The steps that I only had to change to work for me was:

• In the sixth step, add the semmicolon at the end of the sentence
• I did'nt had to update the database.yml, because when I create the user of the fifth step, I used the user that I put when was doing the postgres installation
• Before of run the "rake: db:create", run your postgres in another tab using "sudo service postgresql start"

Then, run the rake and the rails server and be happy again!