Reorganizing view package in editor
Merge pull request #11 from anserran/moveviews

Reorganizing view package in editor
Added file option And a new method for asking for folders, and some javadoc in platform
Now using constraints in IntegerOptions
will slowly add constraints to othe option types
Merge pull request #13 from manuel-freire/integeroptions

Integeroptions - in collaboration with angel serrano
Simplified EditorModel, ModelEvents
also added a test for the new ModelEvents
(no longer interface, adapted from old MergeableChange)
Merge pull request #14 from manuel-freire/simplified-events

Simplified EditorModel, ModelEvents