Readme plugins
* Adds several plugin READMEs
They are pretty basic, but it's a start.
* Changes status.net/wiki URLs to git.gnu.io
The status.net wiki is dead.
See merge request !103
Update translator documentation.
Number parameters where more than one is used.
L10n updates.
Update README file to break lines at or just before 80 characters.
Remove PHP4-ism "?>"
Update indentation.
Update whitespace.
* users need to have 'modhelper' role manually added via userrole.php for now
* modhelper users can sandbox/unsandbox and silence/unsilence any user
** note that no new logging has been added for these moderator actions
* no user deletion for modhelpers
* probably no UserFlags special views for modhelpers