merge
a real test for interpolated features and debug statements
interpolated and not now give the same result, but sliced and one-piece do not
now the one-piece and slice-wise non-interpolated features give the same results
interpolated and not-interpoalated equal slice by slice
interpolated one-piece does not work
all works, but full of debug statements
remove debug printout, add asserts
now also for data without channels
correct multifeature computations for non-interpolated
fix the offset again
now also for the data with time
Merge branch 'interFeaturesFixed-rebased'
roi.py: Fixed a crash in extendSlice() if the start arg wasn't iterable.
Minor cleanups.
OpFilterLabels: Added an optional input slot to filter based on Max size, too.
Merge branch 'master' of ssh://github.com/ilastik/lazyflow

Conflicts:
	lazyflow/operators/opFilterLabels.py
	lazyflow/roi.py
OpColorizeLabels: Provide correct drange in Output metadata.
OpVigraLabelVolume: optimization: Write results directly to destination array.
OpCompressedCache: Added debug logging statements for compression ratio.