serialize ewoks inputs and outputs
For now the objects going from the different ewoks tasks are python object (like TomoScan, Volumes...). To get something able to use celery we would need to made those object serializable
I think the best would be to have it serialized by default (so we can launch ewoks job by default) and get an optional input to the task that would be 'serialized_data' and 'serialized_volume' (if necessary). Others are expected to be already serialized.
The idea behind is to avoid spending time serializing - de-serializing 'data' object as we spend most of our time with orange