Create an E-R diagram

[rsmith531]

The E-R diagram can give us a roadmap for how the database will look. It will be complete when basic functionality is implemented but can evolve over time as more functionality is found to be needed.

[rsmith531]

Categories of info for a user:
- Demographic (age, gender, etc.)
- Account management (username, password, etc.)
- Personality (religion, cuisine, hobbies, etc.)
- Administrative (blocked users, matches, etc.)