Adding TelephoneNumber and EmailAddress

[rockc15]

We can represent both as a DesignativeICE that designates a telecommunications endpoint assigned to an EmailBox or Telephone. However, from a user's perspective, the terms are commonly encountered and the semantics are awkward. Having the terms would help outside developers and users.

[APCox]

Both terms already exist in an extension ontology (Agent History) as subclasses of 'Telecommunication Network Identifier', which is a DesignativeICE. They should be reviewed for promotion to the mid-level.

[neilotte]

@APCox There are now at least two issues that have been moved into discussion that hang on adding patterns around PII and ensuring they are robust in CCO and satisfy competency questions. I'm moving this one over there as well so that these issues may be aggregates and addressed in a workplan.