doing $data->var = $val; instead of $data->assign('var', $val);
+ Added get()/unassign()/isAssigned() methods to read, remove and check for the 
  presence of a var inside a Dwoo_Data object 


git-svn-id: svn://dwoo.org/dwoo/trunk@98 0598d79b-80c4-4d41-97ba-ac86fbbd088b