Implement authentication in the application

[x] Update pom to include the Spring security packages
[x] Update the User model to implement a copy constructor
[x] Create a UserWithRoles model to handle User authentication and authorization
[x] Create a UserDetailsLoader service to communicate with the UsersWithRoles model
[x] Create a SecurityConfiguration configuration to configure security for the application
[x] Update the UsersController to use hashing to hash the password
[x] Create an AuthenticationController controller to handle the /login route
[x] Update the navbar partial to include a logout link
[x] Update controllers to use the logged in user instead of hardcoding the user
[x] Update views to include Thymeleaf integration of security

MPTDesigns / nutritrackr