Android specific:
- Temporary screen orientation lock added. Long tap (5 seconds) to the
  playground locks/unlocks (toggle) automatic screen rotation.
- Toolbar: configuration of displayed toolbar buttons added to options menu.
- Toolbar: dynamic updates on Toolbar and Options settings.
- Toolbar buttons for 'new deal' and 'restart' have now a delayed
  functionality. This prevents from accidental execution.
Main version:
- consult NEWS.asscidoc or html-src/news.html on
  github for more change informations.