Replace the SetPEFlags code

Remove the outdated license text.
Use the main cef.inc file in all Delphi demos.
Fixed issue #493.

demos/Delphi_VCL/URLRequest/uURLRequest.dfm

@@ -27,8 +27,6 @@ object URLRequestFrm: TURLRequestFrm
       item
         Width = 500
       end>
-    ExplicitTop = 425
-    ExplicitWidth = 514
   end
   object GETGbx: TGroupBox
     Left = 10