add user model

add attr_accessible for name, email, password
add presence validations name, email, password
add uniqueness validation for email
add has_secure_password for BCrypt
add routes for user

add user resources
add login / logout
add root to "pages#index"
add views for user signup

add signup link to application layout
add navbar partial
add root path index page
add form for user signup
add basic profile page user#show
add user controller with actions for signup

add #new, #create