added code to handle grouping of constraints

org.fortiss.tooling.base.ui/trunk/META-INF/MANIFEST.MF

....ui/trunk/src/org/fortiss/tooling/base/ui/editor/.ratings

.../tooling/base/ui/editor/ConstraintBasedProcessEditor.java

...e.ui/trunk/src/org/fortiss/tooling/base/ui/utils/.ratings

...nk/src/org/fortiss/tooling/base/ui/utils/StatusUtils.java

...l/trunk/src/org/fortiss/tooling/kernel/extension/.ratings

...src/org/fortiss/tooling/kernel/extension/IConstraint.java

...rg/fortiss/tooling/kernel/internal/ConstraintService.java

...nel/trunk/src/org/fortiss/tooling/kernel/service/.ratings

...rg/fortiss/tooling/kernel/service/IConstraintService.java