implement names (able to remember names or change how visitor should be called)

[lawrencelm]

1. Ask for visitor's name or how she/he should be called. Also allow for "Call Me X" like Siri
2. Store response in db and have a boolean whose value is initially false. Switch the value to true, so I know I have the visitor's name
3. Somehow have this be unique for each visitor. Could use IP for this and for other settings/customizations in general. Just store each IP in db and then hash it as the object's ID so lookup will be more efficient