reruncheck uses pickle now instead of json

should fix unicode problem
Added reference for Liver test scenario
test case for scenarios
Merge remote-tracking branch 'origin/master' into pythontest
Merge branch 'experimental' of https://github.com/CognitionGuidedSurgery/msml into experimental
Merge remote-tracking branch 'origin/experimental' into pythontest
scenarios test
sofa executable for circleci
add test reference file
added tmp
fix exec paths
relaxing test for vtk-> vtu
test for meta is None in base exporter
Merge branch 'master' of https://github.com/CognitionGuidedSurgery/msml
Merge branch 'master' of https://github.com/CognitionGuidedSurgery/msml
Merge branch 'pythontest'
Merge branch 'master' of https://github.com/CognitionGuidedSurgery/msml