Bootstrap for styles/sendgrid

installed the twitter bootstrap gem to customize the application layout and forms. I also installed unicorn, foreman, and set up sendgrid for devise recoverable. Additionally I created two files called .env where I stored sensitive information such as sendgrid data as environment variables. In addition, Procfile was also created. Those files were added to gitignore so no sensitive data are exposed to the public. Moreover, I created a user account.
Note that in development, the `HEROKU`, `SENDGRID_USERNAME`, and `SENDGRID_PASSWORD` environmental variables will not be available--unless you've explicitly set them in your `.env`. You might be required to set up a local SMTP server on your machine to send emails or to turn off emails when testing locally.