improve fielmap algirithm
fix magnitude and pahase map not taken into charge into baskup task
modify or add some mask into tensor and hardi tasks
fix deadlock issue from subjectmanager
implement a resubmit mechanism
changing the nice of popen to 20, add functionnality t0 fieldmap task
fix some getTarget type
Merge pull request #5 from mathieudesro/master

Improve code stability