Rtt maskseed

Added Map seeding option in HARDI-RTT Ui.
User can now either draw, or load a binary map to act as seeding points.
The number of seeds per axis slider can be used to determine how many seed per voxels are present.
(use 1,2 or 3 seed per axis, for optimal results) , fixes #93


Also fixed anatomy reloading bug, fixes #136
Also removed unused commented lines, fixes #79