updated UML file
adding all classes to UML :-)
Fixed duplicate code in layoutHorizontal and layoutVertical methods
Used cleaned up ErrorLogView using EasyGridFactory
Cleaned up StateView using EasyGridFactory
MINOR TWEAK: Removed out of date command hierarchy classes
Merge branch 'master' of https://github.com/rosspcahoon/slogo into view
Created Preferences Menu, need to add French resources for this
Added MenuBar options for Background, Turtle and Pen
Slightly ammended output of StateView
Implemented changing background images
Implemented toggling reference grids