Fixed User Signup & authegy_routes

• Fixed User Signup

• Use router method 'authegy_routes' instead of 'devise_for'

Minor correction over generated User model

The devise modules :database_authenticatable and :validatable are being already added (although with some changes) by the Authegy::User class.

This release includes a minor correction to the User model template to reflect this.

Initial Release

For now, it fill first run the devise:install generator, and then will create the Person, User, Role and RoleAssignment models, along with the database migration to create their required tables.