some PEP8 corrections, and simplifications
initial commit for gc-seg
graphcut even git its own workflow
added graphcut workflow
fixed tiling bug
moved GC-segmentation op into ilastik
try-except for opengm
test graphcut-applet only if opengm available
got back to a working version with new OpLabelVolume
only integer indexing, removed channel spinbox from applet
removed unnecessary labeling operator
Merge branch 'master' into graphcut-applet
Merge branch 'master' into graphcut-applet
Merge branch 'master' into graphcut-applet
Merge branch 'thresholding-optimizations' into thresholding-applet-extension
added graphcut to thresholding applet
made safe for non-opengm systems
Merge branch 'master' into thresholding-applet-extension
OpPixelClassification: Minor optimization in uncertainty layer, plus comments.
shell: Only one menu should have the 'S' shortcut.