Added virtual mehods for OnSaving and OnRefreshed - both called after async operation is completed and before Model property is set.  bugid: 730
Added virtual mehods for OnSaving and OnRefreshed - both called after async operation is completed and before Model property is set. 
bugid: 730


ronnymgm/csla-light,BrettJaner/csla,rockfordlhotka/csla,rockfordlhotka/csla,jonnybee/csla,BrettJaner/csla,BrettJaner/csla,MarimerLLC/csla,JasonBock/csla,JasonBock/csla,rockfordlhotka/csla,MarimerLLC/csla,ronnymgm/csla-light,jonnybee/csla,MarimerLLC/csla,JasonBock/csla,jonnybee/csla,ronnymgm/csla-light