Demo's for IWJQAccordion and IWJQPageControl

[jeroen.rottink]

I tested it with IW15.2.69 but also get an AV using CreateSection().
Steps to reproduce:

• New project
  
• Add an empty TIWjQAccordion and a TIWButton to the project.
  
• TIWButton.OnAsyncClick with following code
  

Code:

procedure TIWForm1.IWButton1AsyncClick(Sender: TObject; EventParams: TStringList);
begin
  // gives an AV
  IWjQAccordion1.CreateSection('Testing');
end;

I also tested \Demos\15\Delphi\AsyncRender and that example (other use case) is working.