Template::Plugin::Siesta - convenience class for Siesta template pages
creates a new Template::Siesta::Plugin from, using an array of name value pairs to provide arguments,
if the arguments contain an action request then ( see ->action() ) then the requested action will be performed before returning the new object;
if called with no aruments, returns the currently defined action. if called with a string value, sets the action or warns of an error if the class cannot ->ACTION_$action
blow an error
Return value of the action