Updating description in the extension file of FinslerTractogrpahy
Merge pull request #744 from pnlbwh/update-FinslerTractography

Updating description in the extension file of FinslerTractogrpahy
Merge pull request #745 from pnlbwh/update-UKFTractography

Updating description in the extension file of UKFTractogrpahy
Further updates to description of UKFTractogrpahy