Merge branch 'release/2.3.1'

.gitignore

README.md

build.gradle

de.bmotionstudio.gef.editor/META-INF/MANIFEST.MF

.../src/de/bmotionstudio/gef/editor/EditorImageRegistry.java

...motionstudio/gef/editor/action/BMotionAbstractWizard.java

...motionstudio/gef/editor/action/BMotionObserverWizard.java

...rc/de/bmotionstudio/gef/editor/action/ObserverAction.java

...tionstudio/gef/editor/attribute/BAttributeConnection.java

...o/gef/editor/edit/AttributeExpressionEdittingSupport.java

...nstudio/gef/editor/edit/OperationValueEditingSupport.java

...motionstudio/gef/editor/edit/PredicateEditingSupport.java

.../de/bmotionstudio/gef/editor/edit/TextEditingSupport.java

...rc/de/bmotionstudio/gef/editor/figure/BMSImageFigure.java

...r/src/de/bmotionstudio/gef/editor/internal/Animation.java

...tudio/gef/editor/observer/ListenOperationByPredicate.java

...tionstudio/gef/editor/observer/ListenOperationObject.java

...bmotionstudio/gef/editor/observer/ObserverEvalObject.java

...onstudio/gef/editor/observer/ToggleObjectCoordinates.java

...f/editor/observer/wizard/WizardObserverAddItemAction.java