WIP for z-normalization
Introduced new cluster parameter (-cg for cluster genes) for data set
builder
Introduced z-score parameters to numerical properties & implemented it a
s pre-processing
Introduced stddev clipping to numerical properties & implemented it as
normalization

This should finally fix #1487 and also fix #1533
linear bar heatmap: render group separator lines
fine tuning:
 * sandbox print all errors
 * Labels provide SWT jface label provider
 * APickingEntry toString
Merge remote-tracking branch 'origin/develop' into develop_maven
bugfixing corner case initialize parented but not initialized child