/**
  * If a plugin adds an action
  * for the public side and an action for the admin side, the action will be accessible via
  * both index.php?op=theActionName and admin.php?op=theActionName. We will use
  * use a global variable that is initialized when the constructor of
  * this class is called. If that variable is set to 'true', then it means that our constructor
  * was initialized and that we can go ahead and add the action. If not, then we skip the whole
  * thing and the action is not added.
  *
  * This method should therefore be called when adding new actions but <b>only for the public side</b>. In
  * case of plugins, please use PluginBase::registerBlogAction() and PluginBase::registerAdminAction()
  * which will nicely hide all these things from you.
  *         
  * @param actionKey Action key to add
  * @param actionClass Action class to which the class will map
  * @see Controller
  */
 function registerAction($actionKey, $actionClass)
 {
     global $_plogAdminController_running;
     if ($_plogAdminController_running) {
         Controller::registerAction($actionKey, $actionClass);
     }
     return true;
 }