Updated README to point out it's a beta.
Typo in test.
Added checking for role based emails.
Added isEmailAddress function.
Called isEmailAddress before all other tests.
Added isValid function to execute all tests.
Reordered functions in code to match the order they are clued in isValid()
Renamed isEmailAddress to isEmail
Updated README to include isEmail and isRole functions.
Updated README with testing info.