further on Email struct with getters and setters

[mikedilger]

This has been in development on the master/dev branches, and will be available soon.

[mikedilger]

TBD:

• Write tests for each of the getters/setters we currently have
• Do the resent-fields as well.
• Implement Display (maybe derive Debug?)
• Implement Streamable or otherwise output (to_string() at least)
• Is function chaining possible with Results? Prob not but be sure it is not.