Merge pull request #93 from andhieka/working

Refactor packages to follow MVC Model
Merge pull request #94 from andhieka/working

bugfix
added four image files for the icon of the buttons. Changed the whole structure of the fxml file for the GUI. Put image icon in the button in GUI.
Merge pull request #98 from liafailboy/working

added four image files for the icon of the buttons. Changed the whole st...
Rewrite parser