new class for segmentPairEnds
Merge branch 'visualizesegp' of https://github.com/thanujadax/sopnet into segmentsets

Conflicts:
	modules/imageprocessing
updated submodules
Merge branch 'master' into segmentsets
applying stashed changes for adding segment pair ends. WIP
added segment pair ends to Segments class
Merge branch 'master' into segmentsets
added segment pair ends to Sopnet, ProblemAssembler with binary option for each
first implementation of feature extractor for segment pair ends
added features for segmentPairEnds
common input for segPairExtractor when either sp or spe is enabled
added segmentPairEnds to segmentPairDetailsWriter
added segmentPairEnds to linear cost function and gold standard cost function
added segmentPairEnds into RandomForestCostFunction signature (only)
added segmentPairEnds to Reconstructor and SegmentationCostFunction(signature only)
added segmentPairEnds to ObjectiveGenerator
fixed syntax errors
increased verbosity for debugging segpairend problem
fixed bug with initialization
removed verbose debug messages