Added email validation format for user and related test. Relax format to allow dummy @example.com but at least having at signa and domain
fake user email is created if blank email is provided. Fixed regex to make sure a valid email address is entered. User creation errors are properly showing in view
added spec/models/user_spec.rb
Merge pull request #98 from coopdevs/user_email_validation

Added email validation format for user and related test. Fixed validation errors when creating users to provide i18n feedback.