We cannot use GPU for lab converter in converter multiprocesses, because almost all VRAM ate by model process, so even 300Mb free VRAM not enough for tensorflow lab converter.
Removed skimage dependency.
Refactorings.
Adds improvements to the manual selection process. You can now
click to lock the selection box, and can also go forward and backwards
to modify selections after they have been made. You can also now push
'Q' to skip all remaining images to quickly save the extractions you
have already made.
