dependency to gridtk
I was wondering, why this package is now -- by default -- dependent on gridtk?
GridTK is not required to use this package -- not even to run the tests (there is an actual flag that tests if gridtk is installed and skips the tests that require gridtk). I can understand that we have gridtk inside
test_requirements.txt, but bob.bio packages do not require gridtk to run (not even
bob.bio.gmm). I can understand that it is a nice addition to have, but I don't see, why this is a default requirement.