User model: Split the name field into two: first_name and last_name

[ag4ta]

User model has only one field for name.
A better way to store name is to store it in separated fields: first_name and last_name.

Have to do:

• create columns: first_name, last_name
• copy content from old column to new columns
• remove name column

[mpapis]

Well, it's our way of thinking in 2 parts of the name, in other countries it is different, how about having name and display_name? Assuming we have a need for distinguishing, do we?