* translate moderation view, controller and model
* support for i18n in the moderation controller
* support for i18n in the moderation model - use interpolation for variables inside strings
* support for i18n in controller model - localize time and date string format for printing time and date of the moderation action
- add users.is_moderator and look at that for most things, not
is_admin
- make default user in readme be a moderator
- log moderator actions in story edits, comment
deletions/undeletions (and later, user disabling).
- remove ability for moderators to edit comments, there's really no
reason to.
