[+] BO : Override of list, form or view fields

This is a method to allow to add new fields in admin controllers.

In adminController.php, i add new functions to override in AdminController--- : 

getTemplateListVars()
getTemplateViewVars()
getTemplateFormVars()

Now i can easily add some new fields, by override these functions, and not the all functions renderView(), or renderList(),...

Like:
In Override/.../adminControllerCustomer:
public function getTemplateViewVars()
{
     $myVars = array('var1'=>value, .......);
     return array_merge($myVars, $this->tpl_view_vars);
}