sebbacon/alaveteli — Issue #285: Username change without changing history. 
Author: RichardTaylor
Created: 2011-11-10 00:28:15+00:00
State: open

There are circumstances where we might want to change a username (effective from a particular point in time) and have the system use the original name for correspondence threads before that date.

eg. Someone changes their name on marriage

eg. Someone changes their name for any other reason