added thread safety
generate user model
add some basic validation for User model
add email index to users and downcase on save to ensure database level uniqueness of email
create secure_password and authentication for user
added debug information on page for development
added user routes and created basic show and index page
created user factory and refactored user specs
created user feature tests
update user page layout and add gravatar
added working signup page
create user model and implement sign up
fixed paths for heroku, will not work ideally with subdomain anymore
add SSL in production