Move ClassLabelProvider to JFace package
Add ClassComboViewer
Overload select method for comboViewer
Use ClassComboViewer in wizard
Introduce ClassCellEditor
Use Collection of String as input for Combo buttons
Enable to get input of viewer as collection
Refactor ClassViewer to StringViewer
Use * instad of True, false
Add validator reference table viewer
Add PropertyWizard
Use property wizard
Add message page structure
ModelMapper is not singleton

* Every PerfClipseModelObject holds instance of mapper object.
* Components inherits mapper from parent component.

* Also introduced superClass for model components