(Ports) Avoid size values to -1
Fix NPE with EntitySelectionDialog
Move identifiers methods to a Util class
Implements Kieler auto-layout feature
Improve properties management
Minor fixes
ShapePropertyManager is able to manage all PropertyContainers

Not only limited to PictogramElements
Simplify objects hierarchy used to draw a Network port
Refactoring on ShapePropertyManager
Do not allow anchors to be moved in an instance
Minor updates
Major refactoring for InstancePattern
Do not display "Remove" button when context buttons are displayed
Fix Connection pattern with last changes
Improve drawing of connections arrows
Fix Diagram initialization (from Network)
Split AutoLayoutFeature into 2 separated classes
Code cleaning