Include non-formatted binding

Includes a new variable for the directive that can be used to bind to the non-formatted version of the inputted phone number. Example:

  <input id="phoneNumberTest" type="text" name="phoneNumberTest" ng-model="phoneNumber" phone-number
         country-code="countrycode" non-formatted="nonFormattedPhoneNumber">

Where nonFormattedPhoneNumber will be the phone number with no formatting applied.