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  comments start with a double-quote " character followed by a commentId character ('-' in this comment)
  the website tip is enclosed in {} and must not contain any '('
  menu sections are enclosed in {} and contain at least one '(' each
  menu chapters are encolsed in []
  ~ between menus insers extra <br> spacings
  ^ instead of | as link-to-text separator means open in new window
  ! instead of | as link-to-text separator means the link is inactive, and link may be skipped in the menu source
  * instead of | as link-to-text separator means hide the page browser menu when opening the page
  @ at the beginning of a chapter makes it a book (i.e. display 'previous' and 'next' links on the book's pages)
  do not use special HTML characters in the menu, such as &, <, >, etc
  do not use simple paranthesis ( and ) or double-quotes " in text (e.g. menu titles, title tips, tips)
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