logging: Added logger entry for "workflows" logger.
timer: Added start() and stop() functions to the API.
GUI tests: When waiting for an imageview to finish rendering, wait for ALL tiles.
(Requires recent volumina commit.)
tests: PixelClassification: Added timing logging, increased data size, and zoom out for interactive test.
tests: PixelClassificationGui: Reduced test dataset size.
tests: Pixel classification: Added a test for benchmarking (so far, only benchmarks interactive mode)
GUI benchmarking: Added a step for moving 1 z-slice.