CleanupPlugin: a chance to cleanup a plugin at the end of a program
+StartActionExecute: Right before the "prepare" call of the current Action
+- $action: the current Action object
+- &$args: array of arguments, referenced so you can modify the array
+
+EndActionExecute: Right after the "handle" call of the current Action
+- $action: the current Action object
+
StartPrimaryNav: Showing the primary nav menu
- $action: the current action