
* fix TAB focus handling

* comment more detailed in order to get a nice documentation
  (comment all header files obeying doc++ documentation style)
  ... better use doxygen

* test test test ...

* change layout engine of MultiLineEdit to support varying line heights

* check if we could use DirectSurface for all widgets !
    -> rootwidget would call surface->beginModify(), then call all childs'
    create method and afterwards would call surface->endModify()
    - this breaks all the current (semi-)transparent fun -
      ... but would increase the update speed significantly !!

* optional use SDL_image for surface loading ?

* enable resizeable windows !

* Surface::writeToFile() only supports INDEXED and RGBA8888 surfaces

* make more and _nicer_ demos, and demo packages
