Display Properties

[Markus396]

Onclick show several attributes at the right properties panel.
click on node -> name, location, attributes, operations, etc
click on edge ->source, target, edgeType, etc
click on graph -> either deselect or do nothing

for more information: http://zeta.syslab.in.htwg-konstanz.de/api

[dkoch2]

All properties can be accessed due to UMLClassModel changes.
Next step is to add Edge properties and clean up the code.