added roi based img normalizer.

deprecated old image normalizer
fixed minor bug in twovaluestocellnodemodel
minor fix in ImgNormalizerNodeFactory
WIP
WIP
First version of ImgNormalizerNodeFactory
added filling methods
fixed enumutils
inverter now works on ROIs
fixed bug in inverter
inverter, thresholder and normalizer with ROI

old implementations are deprecated
added descriptions
added some comments
Integrate changes of ImgLib2

	* Mainly the projector branch changed
	* Refactoring was performed
	* Please report performance issues + false displays/rendering
Merge branch 'master' of https://github.com/knime-ip/knip
removed redundant LabelingView / ImgView

LabelingView and ImgView are part of imglib2 core now.
we were able to remove them.

ImgPlusView was also removed because this can easily be done with
new ImgPlus<T>(new ImgView<T>(...), meta).
after-id '/' replaced by empty after-id '' to get rid of error message in knime log
fixed version of scifio
Updated Manifests of several projects
code-cleanup