Made the TextArea scrollable. Improves the performance from resize in TextAreaContent
Merge branch 'NewEditor' of github.com:SWP-Ubau-SoSe2014-Haskell/SWPSoSe14 into NewEditor
Fixed Serialize function -> save file works correct now.
Fixed dezirialize function -> open file works correct now.
Fixed Display bug after open a file.
Fixed getFocus to TextArea by clicking in.
Added getPositionedGrid.
Added the abillity to scroll.
Added resize feature to TextArea after file open.
Improved the rendering performance a lot by just drawing the
  scrollable frame.
Merge branch 'NewEditor' of github.com:SWP-Ubau-SoSe2014-Haskell/SWPSoSe14 into NewEditor