[WIP] NORDIC denoising on dMRI images

[PaulBautin]

Implements NORDIC denoising for application on dMRI images:

• added flag -dwi_phase, to input phase images necessary for NORDIC denoising. If -dwi_phase has an input then NORDIC denoising is applied else -dwi_phase has no input (DEFAULT or manual) then pipeline is ran as previously.

Notes:

• For the moment -dwi_phase image order must correspond to -dwi_main magnitude image order

TODO:

• NORDIC matlab repo must be added as export in init.sh and any micapipe script. (was added to Dockerfile)

PR associated with issue #127

[PaulBautin]

This is the comparison of NORDIC and previous denoising method after full pre-processing!: