Update schema with new columns
Update schema with new columns

- User: firstName, lastName, lobbyPic
- Comments table: remove 'user_id' foreign key reliance and change column
to denormalized 'email' column as a workaround to a Sequelize bug where
'BelongsToMany' doesn't properly allow 2 foreign keys inside a join
table (complains that those foreign keys aren't unique).

francoabaroa/escape-reality,lowtalkers/escape-reality,francoabaroa/escape-reality,lowtalkers/escape-reality