Added isolated scope - Fixed onBlur performance issue that affected Remote validation

• Added possibility to use own isolated scope (issue #37 and #26).
• Fixed an implementation issue found from last revision (issue #35).
• Fixed email validation (issue #38).
• Fixed a performance issue found with onBlur which would run as much validations as there was characters inside the input when onBlur was called (abcdef => would make 6 validations) and this was extremely costly with a Remote validation call.
• Update the code of Remote validation to also accept the "As" alias "remote:vm.customRemoteValidation".
• Finally added and updated a few Protractor tests to cover all of the above and more.