#8 move classes: Drools, gui

[Jean-Marc Vanel]

NOTE: of course this is not a (user-visible) feature, but it is convenient ot add it here...

Refactoring: move classes

Move n3_project/helpers/*Drools* and related classes to package
eulergui.drools_engine

Move most of n3_project package, starting with ProjectGUI to package eulergui.gui.*
- ProjectGUI to eulergui.gui
- *Management* to package eulergui.gui.actions
- *View* to package eulergui.gui.view

n3_project is too big , and should be splitted; but in doubt to the destination, keep the class here , and we can talk about it.

Olivier, do you have "move class" refactoring in IntelliJ ?
Can you move several classes together?