Allow the generation of users from the command line non-interactively.
The creation of the initial user is the only piece of WriteFreely setup that is still interactive-only. Adding this feature will make it possible to completely automate the initial setup of a blog.
Advanced users and automation.
Create a command writefreely --create-user username:password that creates a user with username username and password password.
Support for single-blog setup is in scope. Support for multi-blog setup is out of scope.