* Using subprocess to start brain segmenter

* Wrong mode in comm_array opening

* Managing errors

* calling get_plaidml_device out of main process to avoid crash with plaidml

* Trying to use multiprocessing instead of subprocess

* Trying to use multiprocessing instead of subprocess

* Using a class to keep brain segmentation

* Putting probability_array in SegmentProcess

* Some cleaning and style modifications

* Moved brainseg model to models/brain_mri_t1

* Setting _ on children process

* Added option to create or no create a new mask

* Setting lang and _ outside of InVesalius class

* models -> ai