Waehlby Cell Clump Splitter and MooreContourExtractionOp

Hello guys!

I finally finished the "Waehlby Cell Clump Splitter". This pull request also includes the MooreContourExtractionOp, which was required for the cellclumpsplitter.

Note: There still is a debug node for the MooreContourExtractionOp. You may remove or keep it.

Greeting, 
Squareys (Jonathan Hale)