Cleaning up

Cleaned up code/added comments
Added WindowCommands and windowing calls in Study
Cleaned up the StudyIterator interface; it now only has iteration-related things
Added Strategies for image loading (made MedImage more cohesive)
Merge branch 'master' of http://github.com/giovannicarvelli/SE262

Conflicts:
	SE262/bin/command/Command.class
	SE262/bin/command/CommandList.class
	SE262/bin/command/NextCommand.class
	SE262/bin/command/PreviousCommand.class
	SE262/bin/command/SwapCommand.class
	SE262/bin/model/MedImage.class
	SE262/bin/model/Study.class
	SE262/bin/model/StudyIterator.class
	SE262/bin/model/StudyRetriever.class
	SE262/bin/strategy/IterateFour.class
	SE262/bin/strategy/IterateOne.class
	SE262/bin/strategy/IterationStrategy.class
	SE262/bin/view/ListFrame$1.class
	SE262/bin/view/ListFrame.class
	SE262/bin/view/MyView.class
	SE262/bin/view/StudyFrame.class
	SE262/src/model/Study.java
	SE262/src/view/StudyFrame.java