Removed forking message
Added support for batch-injecting files
Documented aliases (and added db -> database)
Added --force support for 'database upgrade'
Added support for using FileUploader from a script

Setting the standalone flag to a truthy value disables some of its
$c use and allows a direct $dbic object.
Added a global chained variable
Remove duplicate 'Operating on' messages in chained mode
Added a means for plugins to add lixuzctl commands

Plugins may add their scripts to tools/plugins.d/ (content/tools/plugins.d/ in
a package tree), and they will then be made available under 'lixuzctl plugins'