new module for creating a mean normalised T1 for sample
new module for importing BET mask as new pilab_mask stream
now drop bad voxels from all splits using any rather than all test
documentation
changed to use new pilab_mask stream instead of epiBETmask
new non-rigid body session alignment module (replaces aamod_realign
module for making a normalised, study-level pilab_mask_group from intersection of pilab_masks
new module for normalising (searchlight) RDMs
new module for group RFX searchlight RSA