* style adjustments, now window and button style
* fix bug when logging on a tile with too many creatures
* remove deprecated onLogin and onLogout events
* complete scrollbar skin
* implement scrollbar functionality (scrolling with mouse)
* fix onMouseClick issues
* add tabs in options (graphics and general tab)
* add new option for limiting frame rate using scrollbar
* add new widget property "clipping" that will be used on scrollable areas