tests: request: test_cancel_basic() should be less sensitive to timing concerns now.
skip dvid tests if dvid not available
Merge pull request #120 from burgerdev/dvid-fix

skip dvid tests if dvid not available
tests: dvid: Adapt to latest dvidclient mockserver changes.
testOpFormattedDataExport: Use allclose() for data check.
Push "pslice not none, but we are in a list!" error into the debug log.
Fixes ilastik/ilastik#814
If faulthandler module is available, use it.
OpMaxChannelIndicatorOperator: Provide drange=(0,1)
(That way segmentation exports in ilastik's pixel classification workflow have a drange.)
removed AxisIndex bug in MultiArrayStacker
added ArrayStacker unit test
Merge branch 'stacker-bug' into CCL-refactoring