2.5:
    * Added URL-Button to the comment-buttons.
    * Added hovertext to buttons.
    * Markup-buttons now also react if no text was selected.
    * Preview is now deselectable.
    * Added Option to use inline-javascript for the parameters because of
    performance-issues with the ajax-call.
    * Ajax-call no longer gets executed twice when markup-buttons and
      preview are activated.
    * Changed the way global variables were used.
    * Javascript will stop if no commentform is there, improving
      performance.
    
    
