fix(ng.directive:input.email): Input type "email" validation support for incoming 12 character length TLDs

fix(ng.directive:input.email): Input type "email" validation support for incoming 12 character length TLDs

Update EMAIL_REGEXP variable
 - Allow for 12 character TLD's instead of the previous 6
 - See here for reference: http://newgtlds.icann.org//en/program-status/delegated-strings
 - Longest new TLD is .CONSTRUCTION with a length of 12