improvements in histo view

bin/Control/Controller.class

bin/Control/IController.class

bin/presentation/HistoPanel.class

bin/presentation/HistoView$1.class

bin/presentation/HistoView$2.class

bin/presentation/HistoView.class

bin/presentation/MapPanel.class

bin/presentation/MapView.class

bin/presentation/TransparentPanel.class

src/Control/Controller.java

src/Control/IController.java

src/presentation/HistoPanel.java

src/presentation/HistoView.java

src/presentation/MapPanel.java

src/presentation/MapView.java

src/presentation/TransparentPanel.java