Fixed forgot password identity check

As per issue #572 (https://github.com/benedmunds/CodeIgniter-Ion-Auth/issues/572) the forgot_password() function on validation only checked input for email and not per config identity.
Changed language to Swedish & added phone label

Changed language to Swedish and added create_user_validation_phone_label and edit_user_validation_phone_label. The first, second and third part of phone label isn't used anymore but still kept in language file
Added email activation, forgot and new password

Added language items for email related stuff, some items was previously in auth_lang.
Merge pull request #573 from SpyTec/2

Fixed forgot_password() identity: Issue #572. Changed Swedish language file