adding initial email address validation unit tests
correcting assertion validation
adding more email validation tests, per RFC2822 and wikipedia commonly invalid emails
fixed regexp to validate emails with more strict rules as added in tests/users.js which also conforms mostly with RFC2822 guide lines
adding positive email validation unit tests for sanity
fixing up indentation and adding up source for email validation examples
Merge pull request #783 from lirantal/bugfix-email-validation

Bugfix email validation